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A Comprehensive List of Unit Checker Libraries

Table of Contents

Short description

In the spring of 2018 I (Oscar Bennich-Björkman) wrote my master thesis as part of my degree in Information Systems at Uppsala University. The main goal of this thesis involved a comprehensive and systematic analysis of libraries related to the handling of physical quantities or units of measurement. The end result was a group of what I chose to call 'top tier' libraries, which are the best and most well-developed libraries in a range of different programming languages.

Me and my supervisor (Steve McKeever) also remade the core of this thesis into a paper which is to be published in the ACM Journals and presented at the 2018 ACM SIGPLAN International Conference on Software Language Engineering (https://conf.researchr.org/track/sle-2018/papers#About).

This GitHub repository is primarily provided as a way of giving easy access to this data for anyone looking for a library of this kind, as this type of database did not exist prior to this study. Secondarily, this database is a way of making the data more transparent for any reader of either the paper or the thesis.

The most relevant results of the study (the top tier group) is presented first in this repository as this is what is of interest to most readers, but the later sections present the rest of the data in its entirety.

If you have any questions or thoughts you can contact me at: oscar.bennich@gmail.com

If you would like to read more, the master thesis can be found here: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353817 and the paper can be found here: https://dl.acm.org/citation.cfm?id=3276613

Data gathering information

The data presented here was gathered from seven sites, using eight different keywords. More detailed information about this process can be found in either the thesis or the paper. The sites and keywords are found below.

Site name URL
GitHub.com https://github.com/
Bit-Bucket.org https://bitbucket.org/
GitLab.com https://about.gitlab.com/
SourceForge.net https://sourceforge.net/
CodeProject.com https://www.codeproject.com/
LaunchPad.net https://launchpad.net/
Savannah.gnu.org http://savannah.gnu.org/
Keywords
“Units of Measure”
“Units Measure Converter”
“Units”
“Unit Converter”
“Quantities”
“Conversion”
“Unit Conversion”
“Physical Units”

Library Data

The data presented here is categorised as follows; The top tier libraries (the best examples) are presented first. For this group, the amount of units that the library natively supports is also shown. After that the second tier libraries are presented, these libraries are of varying quality but are lacking compared to the top tier group. Then the projects that I have categorised as 'Tools' are presented. These projects fit into the general area of unit of measurement checking but are not libraries. This can for example be a dimension checking console application. The top tier libraries, second tier libraries, and tools together make up the 'Valid Project' group, referenced in the thesis and the paper.

Lastly, for the sake of transparency, the full dataset is presented. This gives anyone the chance to double check my analysis or make their own analysis without having to gather the data again.

Top tier libraries

Back to top

Name Language Amount of units/constants/prefixes supported Source / URL
CaliperSharp C# 132 units, 16 constants, 23 prefixes https://github.com/point85/CaliperSharp
Convertinator C# ~20 units https://github.com/hartez/Convertinator
CSUnits C# 500+ units (including prefixes) https://github.com/cureos/csunits
Cubico C# ~140 units https://github.com/irperez/Cubico
Fhir.Metrics C# ~150 units, 24 prefixes https://github.com/FirelyTeam/Fhir.Metrics
Gu.Units C# ~50 units https://github.com/JohanLarsson/Gu.Units
Quantity System C# 300+ units https://github.com/ibluesun/QuantitySystem
Quantity Types C# 300+ units https://github.com/objorke/QuantityTypes
RedStar.Amounts C# ~80 units, 16 constants https://github.com/petermorlion/RedStar.Amounts/
UnitParser C# ~300 units https://www.codeproject.com/Articles/1211504/UnitParser
UnitsNet C# 600+ units (including prefixes) https://github.com/angularsen/UnitsNet
Using physical quantities and units of measure in C# programs C# ~100 units https://www.codeproject.com/Articles/1066008/Using-physical-quantities-and-units-of-measurement
Working with Units and Amounts C# 70+ units, 16 constants https://www.codeproject.com/Articles/611731/Working-with-Units-and-Amounts
Aegon Python 150+ units https://github.com/lukaskollmer/aegon
Astropy Python ~150 units, 35 constants https://github.com/astropy/astropy
Efficient Scalars in Python Python ~150 units http://russp.us/scalar-python.htm
Misu Python ~450 units, 20 prefixes https://github.com/cjrh/misu
ParamPy Python 50+ units, 16 prefixes https://github.com/matthewwardrop/python-parampy
Pint Python 300+ units, 20 constants, 27 prefixes https://github.com/hgrecco/pint
Pyvalem Python 70+ units https://github.com/xnx/pyqn
Quantiphy Python ~40 units, 19 prefixes, 19 constants https://github.com/KenKundert/quantiphy
Quantities (#1) Python 300+ units, 28 prefixes https://github.com/python-quantities/python-quantities
Scimath Python 300+ units https://github.com/enthought/scimath
BoostUnits C++ ~200 units, 20 prefixes, ~150 constants https://www.boost.org/doc/libs/1_66_0/doc/html/boost_units.html
PhysUnits C++ 100+ units, 7 constants, 28 prefixes https://github.com/martinmoene/PhysUnits-CT-Cpp11
Units C++ ~150 units, 22 prefixes https://github.com/nholthaus/units
Units C++ ~30 units, 330+ constants, 14 prefixes https://github.com/tonypilz/units
Units and measures for C++ 11 C++ ~50 units https://www.codeproject.com/Articles/1088293/Units-and-measures-for-Cplusplus
Alchemist Ruby 500+ units, 88 prefixes https://github.com/halogenandtoast/alchemist
Phys-Units Ruby 2300+ units, 85 prefixes https://github.com/masa16/phys-units
Quantity Ruby ~40 units, 25 prefixes, https://github.com/bhuga/quantity
Ruby Units Ruby ~150 units, 30 prefixes https://github.com/olbrich/ruby-units
SY Ruby 30+ units, ~10 constants https://github.com/boris-s/sy
Unit_Soup Ruby 0 units preloaded? https://github.com/rutvij47/unit_soup
Units-Ruby Ruby 74 units, 5 prefixes https://github.com/bfoz/units-ruby
Unitwise Ruby 300+ units https://github.com/joshwlewis/unitwise
Uom Ruby 63 units https://github.com/caruby/uom
Flowsnake JavaScript 650+ units https://github.com/Eldelshell/flowsnake
JS-quantities JavaScript ~150 units, 30 prefixes https://github.com/gentooboontoo/js-quantities
Mezur JavaScript ~100 units https://github.com/guyisra/mezur
Units by Stak Digital JavaScript ~50 units https://github.com/stak-digital/units
Unitz JavaScript ~70 units https://github.com/ClickerMonkey/unitz
Caliper Java ~130 units, 23 prefixes, 16 constants https://github.com/point85/caliper
JSR 363 Java 35 units https://jcp.org/en/jsr/detail?id=363
SI-Units Java 120+ units, 4 constants https://github.com/unitsofmeasurement/si-units
Unit API - JSR 385 Java 30+ units, 28 prefixes https://github.com/unitsofmeasurement/unit-api
Coulomb Scala ~70 units, 28 prefixes https://github.com/erikerlandson/coulomb
Efficient Scalars in Scala Scala ~150 units http://russp.us/scalar-scala.htm
Scala-units Scala ~120 units https://github.com/bwkimmel/scala-units
SI -- A Scala Library of Units of Measurement Scala ~50 units, 20 prefixes https://gitlab.com/h2b/SI
Squants Scala ~300 units, 28 prefixes https://github.com/typelevel/squants
Convertor PHP 70+ units https://github.com/olifolkerd/convertor
PHP Units of Measure PHP ~100 units https://github.com/PhpUnitsOfMeasure/php-units-of-measure
UnitConverter PHP 130+ units https://github.com/nfraz007/UnitConverter
Dimensional Haskell ~200 units, 21 prefixes https://github.com/bjornbm/dimensional
Quantities Haskell 200+ units, 28 prefixes, 3 constants https://github.com/jdreaver/quantities
UOM-Plugin Haskell 0 units preloaded https://github.com/adamgundry/uom-plugin
Physical Units for Matlab MatLab 800+ units https://github.com/sky-s/physical-units-for-matlab
Quantities MatLab 200+ units, 28 prefixes, 18 constants https://github.com/mikofski/Quantities
MKUnits Swift 80 units https://github.com/michalkonturek/MKUnits
UnitKit Swift 100+ units https://github.com/otaviocc/UnitKit
PHYSICS Multiple ~190 units, 25 prefixes http://sergey-l-gladkiy.narod.ru/index/physics/0-14
Units Multiple 65 units, 70 constants https://github.com/saroad2/units
Dimensioned Rust ~450 units & constants (hard to differentiate) https://github.com/paholg/dimensioned
EiffelUnits Eiffel ~100 units, 21 prefixes http://se.inf.ethz.ch/old/projects/markus_keller/EiffelUnits.html
Elixir Unit Converter Elixir 60+ units https://github.com/carturoch/ex_uc
FURY Fortran ? https://github.com/szaghi/FURY
Lua-Physical Lua ~150 units, 10 prefixes, 21 constants https://github.com/tjenni/lua-physical
Measurement Units for R R Has 0 preloaded units itself, uses other Library "UDUNITS-2" for this https://github.com/r-quantities/units/
Measures with Dimensions Racket ~150 units, 20 prefixes https://github.com/AlexKnauth/measures-with-dimensions
PhysicalQuantities Common Lisp ~40 units, 28 prefixes https://github.com/mrossini-ethz/physical-quantities
PPX_Measure OCalm 0 units preloaded. Generates a lot of code from simple commands instead (see documentation) https://github.com/xvw/ppx_measure
Purescript-Quantities PureScript ~100 units, 23 prefixes, 14 constants https://github.com/sharkdp/purescript-quantities
Quantities Idris ~200 units, 24 prefixes https://github.com/timjb/quantities
Quantities D ~50 units, 20 prefixes https://github.com/biozic/quantities
Red-units Red 960 units, 1100+ constants, 100+ prefixes https://gitlab.com/maxvel/red-units
Uncodium.Units F# ~350 units, 28 prefixes, ~50 constants https://github.com/stefanmaierhofer/Uncodium.Units
Unitful.jl Julia ~170 units, 50 prefixes, 21 constants https://github.com/ajkeller34/Unitful.jl
Units Tcl 60 units, 21 prefixes https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/units/units.html
Units 2 Clojure ~45 units, 28 prefixes https://github.com/mfey/units2
Units of Measure Kotlin 350+ units https://github.com/kunalsheth/units-of-measure
Units of measurement for Ada Ada 100+ units, 20 prefixes https://sourceforge.net/projects/unitsofmeasurementforada/?source=directory

Second tier libraries

Back to top

Name Language Source / URL
.NET Unit Conversion Library C# https://sourceforge.net/projects/unitcon/
.NET Unit Conversion Library C# https://sourceforge.net/projects/unitcon/?source=directory
.NET Units of Measure C# https://bitbucket.org/Thecentury/.net-units-of-measure
Angular-Unit-Converter JavaScript https://github.com/alexandernst/angular-unit-converter
AS3Units ActionScript https://github.com/erussell/AS3Units
Automatic Conversion of Physical Units C# https://www.codeproject.com/Articles/714545/Automatic-Conversion-of-Physical-Units
AutoUnits C++ https://github.com/Fifty-Nine/AutoUnits
Buckingham Python https://github.com/mdipierro/buckingham
C++ Unit Library C++ https://sourceforge.net/projects/cppunitlibrary/?source=directory
C++ Units C++ https://sourceforge.net/projects/cppunits/?source=directory
CF_Units Python https://github.com/SciTools/cf_units
Class-Measure Perl https://github.com/bluefeet/Class-Measure
Constants and Units MatLab https://github.com/mariomerinomartinez/constants_and_units
Conversion PHP https://github.com/abhimanyu003/conversion
Conversion C++ https://github.com/simonmeaden/conversion
Conversionr R https://github.com/alexnakagawa/conversionr
Convert Swift https://github.com/danielbyon/Convert
Convert Units Java https://github.com/ben-ng/convert-units
Convert-Quantities JavaScript https://github.com/kendru/convert-quantities
Convert-units Ruby https://github.com/tanvir002700/convert_unit
Convert.js JavaScript https://github.com/YazilimMuhendisiyizBiz/convert.js
Converter PHP https://github.com/cartalyst/converter
Converting a value to an SI Unit String C# https://www.codeproject.com/Tips/414254/Converting-a-value-to-an-SI-unit-string
Convertr R https://github.com/ropenscilabs/convertr
convertR R https://github.com/colin-fraser/convertR
cppDegRad C++ https://github.com/grahamboree/cppDegRad
Cropio_Units_Converter C++ https://github.com/cropio/cropio_units_converter
Cuis-Smalltalk-Aconcagua Smalltalk https://github.com/hernanwilkinson/Cuis-Smalltalk-Aconcagua
DDUnitConverter Objective-C https://github.com/davedelong/DDUnitConverter
Decibel Units of Measurement with C# Framework C# https://www.codeproject.com/Articles/1236193/Decibel-Units-of-Measurement-with-Csharp-Framework
Dftu C++ https://github.com/triblatron/dftu
Dimanalyser Java https://github.com/cymi/dimanalyser
Dimension-TF Haskell https://github.com/nushio3/dimensional-tf
Dimensional Ruby https://github.com/cch1/Dimensional
DimPy Python http://www.inference.org.uk/db410/dimpy/docs/docs/docs.html
Django-Unit-Field Python https://github.com/kohout/django-unit-field
Engineering C# https://github.com/zhofre/engineering
FSharp.Units F# https://github.com/putridparrot/FSharp.Units
GenUnits F# https://github.com/halcwb/GenUnits
GIM.Quantities C# https://github.com/togakangaroo/GIM.Quantities
Gorilla Ruby https://github.com/stephencelis/gorilla
HHUnitConverter Objective-C https://github.com/HiveHicks/HHUnitConverter
IMT.Units Java https://github.com/imt-ag/imt.units-java
InkUnits Swift https://github.com/angelsolaorbaiceta/InkUnits
International System of Units Notation C# https://www.codeproject.com/Tips/869419/International-System-of-Units-Notation
Java library and framework: quantity Java https://sourceforge.net/projects/javaquantity/?source=directory
Java Measure Java https://sourceforge.net/projects/javameasure/?source=directory
JavaMeasure Java https://github.com/tkuebler/JavaMeasure
JNum Java https://github.com/attipaci/jnum
JQuantity: Precision Math Java Framework Java https://sourceforge.net/projects/jquantity/?source=directory
JSR 275 Java https://github.com/unitsofmeasurement/jsr-275/tree/master/src/main/java
Jsunitconverter JavaScript https://github.com/jerodvenemafm/jsunitconverter
JUNitConv Java https://github.com/duckler/JUnitConv
Lathexa Units JavaScript https://github.com/lethexa/lethexa-units
Libquantify C++ https://github.com/damianorenfer/libquantify
Libunits C https://sourceforge.net/projects/libunits/?source=directory
Maegor JavaScript https://github.com/lukaskollmer/maegor
MagickScience C++ https://github.com/Iarfen/MagickScience
Magnitude (#1) Python https://github.com/juanre/magnitude
Magnitude (#2) Java https://sourceforge.net/projects/magnitude/?source=directory
Math-units Perl https://github.com/kenfox/Math-Units
mcs::units C++ https://sourceforge.net/projects/mcs-units/?source=directory
MeasureBundle PHP https://github.com/akeneo/MeasureBundle
Measurement Unit Conversion Library C# https://www.codeproject.com/Articles/23087/Measurement-Unit-Conversion-Library
Measurement Unit Conversion Library C# https://www.codeproject.com/Articles/662335/Measurement-Unit-Conversion-Library
Measurement.js JavaScript https://github.com/Philzen/measurement.js
Measurements PHP https://github.com/marfurt/measurements
Measurements Ruby https://github.com/Krustal/Measurements
Meteor-Quantities JavaScript https://github.com/luzlab/meteor-quantities
Metiri JavaScript https://github.com/GCheung55/metiri
Metric Java https://github.com/gnapse/metric
Metric Rust https://github.com/coder543/metric
Metric Nim https://github.com/mjendrusch/metric
Natu Python https://github.com/kdavies4/natu
NGenericDimensions C# https://github.com/MafuJosh/NGenericDimensions
NGunits Java https://github.com/erussell/ngunits
NGX-UOM JavaScript https://github.com/catellanir/ngx-uom
Node-units JavaScript https://github.com/brettlangdon/node-units
NumericalChameleon Java https://sourceforge.net/projects/numchameleon/?source=directory
o2scl C https://github.com/awsteiner/o2scl
PHP Unit Conversion PHP https://github.com/pimlie/php-unit-conversion
PHP-Conversion PHP https://github.com/crisu83/php-conversion
PHP-Units PHP https://github.com/hiqdev/php-units
PHPConverter PHP https://github.com/chapmang/PHPConverter
PHPMeasures PHP https://github.com/dcabanaw/phpMeasures
Phys-Types C++ https://github.com/akubera/phys_types
Physcon Python https://github.com/georglind/physcon
Physical C++ https://sourceforge.net/projects/physical/?source=directory
Physical C++ https://github.com/olsonse/physical
Physical Math Python https://github.com/matthagy/physmath
Physical Measure C# https://github.com/KiloBravoLima/PhysicalMeasure
Physical Quantities Smalltalk/C# https://github.com/timdetering/PhysicalQuantities
Physical-Quantities Python https://github.com/hplgit/physical-quantities
PhysicalQuantities Python https://github.com/juhasch/PhysicalQuantities
PhysicalQuantities C# https://github.com/timdetering/PhysicalQuantities
PhysicalQuantities Haskell https://github.com/fehu/PhysicalQuantities
PhysicalUnits C++ https://sourceforge.net/projects/physicalunits/?source=directory
PhysicalValue Swift https://github.com/antonvmironov/PhysicalValue
Physics-Measurement JavaScript https://github.com/victorpotasso/physics-measurement
Physikal Kotlin https://github.com/Tenkiv/Physikal
ProgParam C++ https://github.com/qPCR4vir/ProgParam
puny Python https://sourceforge.net/projects/puny/?source=directory
Purescript-Units PureScript https://github.com/fluffynukeit/purescript-units
PyPhys Class Library Python https://sourceforge.net/projects/pyphys/?source=directory
PyQuantity Python https://github.com/gabbpuy/PyQuantity
Python Unit Conversion Library Python https://sourceforge.net/projects/pythonconvert/?source=directory
Python-Physical Python https://github.com/EdwinChan/python-physical
Python-Units-Of-Measure Python https://github.com/katerina7479/python-units-of-measure
QtUnits C++ https://github.com/hrobeers/QtUnits
Quan C++ https://sourceforge.net/projects/quan/?source=directory
Quantified Ruby https://github.com/Shopify/quantified
Quantify Ruby https://github.com/spatchcock/quantify
Quantities Swift https://github.com/BradLarson/Quantities
Quantities R https://github.com/r-quantities/quantities
Quantities C++ https://github.com/djbarker/quantities
Quantities Batchfile https://github.com/greatfriends/Quantities
Quantities C# https://github.com/atmoos/Quantities
Quantities C++ https://sourceforge.net/projects/quantity/?source=directory
Quantities, Units, and Values: An Object Oriented Implementation C https://www.codeproject.com/Articles/216191/Quantities-Units-and-Values-an-Object-Oriented-Imp
Quantities.net C# https://sourceforge.net/projects/quantitiesnet/
Quantity Ruby https://github.com/bhuga/quantity
Quantity Ruby https://github.com/aportnov/quantity
Quantity Clojure https://github.com/spellman/quantity
Quantity.Net C# https://github.com/bcachet/Quantity.Net
QUDAL C++ https://sourceforge.net/projects/qudal/?source=directory
RockUnits C# https://github.com/gareth-reid/RockUnits
Ruby Units Ruby https://github.com/olbrich/ruby-units
Ruby-Units Ruby https://github.com/davearonson/Ruby-Units
SBUnits Swift https://github.com/EBGToo/SBUnits
ScalaQuantity Scala https://github.com/zzorn/ScalaQuantity
ScalaU Scala https://github.com/adrianfr/scalau
Scale Swift https://github.com/onmyway133/Scale
ScientificQuantities C++ https://github.com/nourani/ScientificQuantities
SI-Units Java https://github.com/unitsofmeasurement/si-units
SIConv Haskell https://github.com/owainlewis/conventional-si-unit-converter
Simple.Units C# https://github.com/oriches/Simple.Units
SIUnits (#1) Haskell https://github.com/joewkr/SIUnits
SIUnitX TeX https://github.com/josephwright/siunitx
Sius Java https://github.com/mbe24/sius
Sundew.Quantities C# https://github.com/hugener/Sundew.Quantities
Superquants Scala https://github.com/rudogma/scala-superquants
SwiftMeasurement Swift https://github.com/ken0nek/SwiftMeasurement
TCX Unit Conversion Library C++ https://www.codeproject.com/Articles/103/TCX-Unit-Conversion-Library
The Units of Measure Library C++ https://sourceforge.net/projects/tuoml/
TundraMeasure.java Java https://github.com/Permafrost/TundraMeasure.java
UDUnits Julia https://github.com/Alexander-Barth/UDUnits.jl
UDUNITS-2 C https://github.com/Unidata/UDUNITS-2
Umpy Python https://github.com/perdixsw/umpy
Unit C++/CMake/Python https://github.com/njoy/unit
Unit JavaScript https://github.com/smartcar/unit
Unit Go https://github.com/martinlindhe/unit
Unit VB .NET https://github.com/AdamSpeight2008/Unit
Unit Management Framework Java https://sourceforge.net/projects/quantitymanager/?source=directory
Unit of Measure Library for .NET C# https://www.codeproject.com/Articles/404573/Units-of-Measure-Library-for-NET
Unit of Measure Validator for C# C# https://www.codeproject.com/Articles/413750/Units-of-Measure-Validator-for-Csharp
Unit Var Python https://sourceforge.net/projects/unitvar/?source=directory
Unit_Conversion Ruby https://github.com/eternal44/unit_conversion
Unit-converter PHP https://github.com/jordanbrauer/unit-converter
Unit-formula Common Lisp https://github.com/Ramarren/unit-formula
Unit.py Python https://github.com/fabian0010/Unit.py
Unit.styl JavaScript https://github.com/diessica/unit.styl
UnitConversion Objective-C https://github.com/unixpickle/UnitConversion
UnitConversion C# https://github.com/gkampolis/UnitConversion
UnitConversion Python https://github.com/UnitConversion/unitConversion
UnitConversion C# https://github.com/Mecteral/UnitConversion
UnitConversionLib C# https://www.codeproject.com/Articles/787029/UnitConversionLib-Smart-Unit-Conversion-Library-in
UnitConvert JavaScript https://github.com/agnoster/unitology
UnitConverter Python https://github.com/mattgd/UnitConverter
UnitConverterWin C https://github.com/NikolaiTyrMDS/UnitConverterWin
UnitManipulationLibrary C++ https://github.com/OuaisBla/UnitManipulationLibrary
UnitOfMeasure C# https://github.com/Chef-Code/UnitOfMeasure
UnitOfMeasure Scala https://github.com/ricemery/unitofmeasure
Units Go https://github.com/zn8nz/units
Units Rust https://github.com/Boddlnagg/units
Units Scala https://github.com/nestorpersist/units
Units PHP https://github.com/ARCANEDEV/Units
Units Go https://github.com/antha-lang/units
Units PHP https://github.com/marando/Units
Units Python https://bitbucket.org/adonohue/units
Units Haskell https://github.com/goldfirere/units
Units Scala https://github.com/KarolS/units
Units C++ https://github.com/lonkamikaze/units
Units Swift https://github.com/chrisjeane/Units
Units Java https://github.com/SamCarlberg/units
Units PHP https://github.com/rmasters/units
Units Ruby https://github.com/woahdae/units
Units Haskell https://hackage.haskell.org/package/units
Units C# https://github.com/engineers-tools/Units
Units Go https://github.com/smyrman/units
Units C# https://github.com/LabyrinthApps/Units
Units and Measurements Racket https://github.com/Metaxal/measures
Units D D https://github.com/nordlow/units-d
Units of Measure C# https://archive.codeplex.com/?p=unitsofmeasure
Units of Measure Prototype Haskell https://github.com/adamgundry/uom-prototype
Units of Measurement Systems Java https://github.com/unitsofmeasurement/uom-systems
Units_of_measure C++ https://github.com/Skeen/units_of_measure
Units-api PHP https://github.com/shrimpza/units-api
Units-of-Measure Scala https://github.com/Mononofu/Units-of-Measure
Units-System Ruby https://github.com/jgoizueta/units-system
Units-v2 C++ https://github.com/Corristo/units-v2
Units.jl Julia https://github.com/autocorr/Units.jl
Units.js JavaScript https://github.com/jairtrejo/units.js
UnitsC++ C++ https://sourceforge.net/projects/unitscpp/?source=directory
UnitsKit Objective-C https://github.com/stevemoser/UnitsKit
UnitsOfMeasure C# https://github.com/capnmidnight/UnitsOfMeasure
UnitsOfMeasureBundle PHP https://github.com/PhpUnitsOfMeasure/UnitsOfMeasureBundle
Unum Python https://bitbucket.org/kiv/unum
Unum Python https://sourceforge.net/projects/unum/?source=directory
UOM Ruby https://github.com/madriska/uom
UOM Conversion Library Java https://sourceforge.net/projects/uomcl/?source=directory
UOM-Domain Java https://github.com/unitsofmeasurement/uom-domain
Uom.Dart Dart https://github.com/damondouglas/uom.dart
ValueWithUnit C# https://github.com/vbfox/ValueWithUnit
VUnits Java https://github.com/vaslabs/vunits

Tools

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Name Language Source / URL
Alfred-Convert Python https://github.com/deanishe/alfred-convert
Alfred-Converter Python https://github.com/WoLpH/alfred-converter
All_In_One_Converter Python https://github.com/pradeepjairamani/All_in_one_converter
Angular-Converter JavaScript https://github.com/cyrilf/angular-converter
BeConverter C++ https://bitbucket.org/Teknomancer/beconverter
ChemicalA C++ https://sourceforge.net/projects/chemicala/?source=directory
Chimp Python https://github.com/mhetrerajat/chimp
Computing with Units Java https://sourceforge.net/projects/units-in-java/?source=directory
Conversion Calculator C++ https://github.com/dtuivs/Converter
ConvertAll Python https://sourceforge.net/projects/convertall/?source=directory
Convertee JavaScript https://github.com/isquaredcreative/Convertee
Converter C++ https://github.com/KerryL/Converter
Converter Java https://sourceforge.net/projects/con-vert/?source=directory
Converter TypeScript https://github.com/ialex90/Converter
Converter C++ https://github.com/scruff3y/Converter
Converter Java https://github.com/samWson/converter
Converter C++ https://github.com/dtalaba/convertor
Converter Java https://github.com/HanSolo/converter
ConverterApp C# https://github.com/halezmo/ConverterApp
ConverTo C++ https://sourceforge.net/projects/converto/?source=directory
Convertor C++ https://github.com/mihaelateo/Convertor
DakaUnitConverter Java https://github.com/darrylfonseka/DakaUnitConverter
EngineeringCalculator C++ https://sourceforge.net/projects/alwaysontopcalc/?source=directory
Enhancing User Experience - Part 1: A Simple Unit Converter Application C# https://www.codeproject.com/Articles/6667/Enhancing-User-Experience-Part-A-Simple-Unit-Con
Esos C++ https://sourceforge.net/projects/esos/?source=directory
Frinj Clojure https://github.com/martintrojer/frinj
Frins Scala https://github.com/martintrojer/frins
GenUnitApp JavaScript https://github.com/halcwb/GenUnitApp
GNU Units C# https://www.gnu.org/software/units/
GodSend PHP https://sourceforge.net/projects/godsend/?source=directory
Insect PureScript https://github.com/sharkdp/insect
JC-Units Python https://github.com/jason0x43/jc-units
JConvert Java https://sourceforge.net/projects/jconvert/?source=directory
JFX Konwerter Java https://sourceforge.net/projects/jfx-konwerter/?source=directory
Libre Unit Conveter C# https://sourceforge.net/projects/libreunitconverter/?source=directory
LibreEngineering Python https://sourceforge.net/projects/libreeng/
M2py Python/Matlab https://github.com/caiorss/m2py
MAIA Unit Converter C++ https://sourceforge.net/projects/maia-unit-conv/?source=directory
Maser JavaScript/Python https://github.com/justinbangerter/maser
Mather Java https://github.com/icasdri/Mather
MeasurementConverter Java https://github.com/SBrooks75/MeasurementConverter
NumericalUnits Python https://github.com/sbyrnes321/numericalunits
ParamPool Python https://github.com/hplgit/parampool
Phriky-Units Python https://github.com/unl-nimbus-lab/phriky-units
Physics Python https://bitbucket.org/hppavilion1/physics
Portable Unit Converter JavaScript https://sourceforge.net/projects/puc/?source=directory
Praktool Python https://github.com/zombofant/praktool
PreciseUnitConverter JavaScript https://github.com/bumxu/PreciseUnitConverter
Punits - Pluggable units C https://sourceforge.net/projects/punits/?source=directory
PythonUnitConverter Python https://github.com/Aaron1011/PythonUnitConverter
PyUnitConverter Python https://github.com/jyri78/PyUnitConverter
qMetrics C++ https://launchpad.net/qmetrics
Quick Unit Converter Java https://sourceforge.net/projects/qunitconverter/?source=directory
Rink Rust https://github.com/tiffany352/rink-rs
Scaler Shell https://github.com/emugel/scaler
SIMConverter C# https://sourceforge.net/projects/simconverter/?source=directory
SimpleMeasurementConverter Java https://github.com/michaelstoops/SimpleMeasurementConverter
SimpleUnitConverter C https://launchpad.net/simpleunitconverter
Smart Units Sidef https://github.com/trizen/smart-units
UConverter Java https://sourceforge.net/projects/uconverter/?source=directory
UNeedIT Converter C# https://sourceforge.net/projects/uneedconverter/?source=directory
Unit PHP https://github.com/pounard/Unit
Unit Java https://bitbucket.org/hansolo/unit
Unit Converter Scratch https://sourceforge.net/projects/unitconverter12/?source=directory
Unit Converter Python https://sourceforge.net/projects/unit-converter/?source=directory
Unit Converter REBOL https://sourceforge.net/projects/tbunitconverter/?source=directory
Unit Conveter C# https://sourceforge.net/projects/unitconversion/?source=directory
Unit_Conversion Python https://github.com/bastihaase/unit_conversion
Unit-Conversion JavaScript https://github.com/srimanthk/unit-conversion
Unit-Converter JavaScript https://github.com/GTLook/Unit-Converter
Unit-converter Python https://bitbucket.org/brayvasq/unit-converter
Unit-Converter JavaScript https://github.com/TheMarco/Unit-Converter
Unit-Converter Java https://github.com/AmitKumarSah/Unit-Converter
Unit-Converter PHP https://github.com/b-sebastian/unit-converter
Unit-Converter C++ https://github.com/mikeleppane/Unit-Converter
Unit-Converter JavaScript https://github.com/MaicolBen/unit-converter
UnitConversion Java https://github.com/yfl007/UnitConversion
UnitConverter Java https://github.com/nevack/UnitConverter
UnitConverter Java https://github.com/MarioDudjak/UnitConverter
UnitConverter Java https://github.com/impateljay/UnitConverter
Unitconverter-Android Java https://github.com/dbrant/unitconverter-android
UnitConverter.htm JavaScript https://github.com/iterami/UnitConverter.htm
UnitConverterUltimate Java https://github.com/physphil/UnitConverterUltimate
UnitMan C# https://github.com/mbeloshapkin/UnitMan
Units Java https://github.com/xxv/Units
Units JavaScript https://github.com/dohliam/units
Vandelay C++ https://github.com/HaikuArchives/Vandelay
Web Unit Converter C# https://sourceforge.net/projects/web-unit-converter/?source=directory
XamConverter C# https://github.com/brminnick/XamConverter
Xiny Go https://github.com/bcicen/xiny

All projects

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Name Language Valid project? Source / URL
.NET Unit Conversion Library C# Yes https://sourceforge.net/projects/unitcon/
.NET Unit Conversion Library C# Yes https://sourceforge.net/projects/unitcon/?source=directory
.NET Units of Measure C# Yes https://bitbucket.org/Thecentury/.net-units-of-measure
A look at the Boost Units Library C++ No https://www.codeproject.com/Articles/988932/Boost-Units-Library
Aegon Python Yes https://github.com/lukaskollmer/aegon
Alchemist Ruby Yes https://github.com/halogenandtoast/alchemist
Alfred-Convert Python Yes https://github.com/deanishe/alfred-convert
Alfred-Converter Python Yes https://github.com/WoLpH/alfred-converter
All Unit Converter Java No https://bitbucket.org/Chawakorn_A/all-unit-converter
All_In_One_Converter Python Yes https://github.com/pradeepjairamani/All_in_one_converter
Angular-Converter JavaScript Yes https://github.com/cyrilf/angular-converter
Angular-Unit-Converter JavaScript Yes https://github.com/alexandernst/angular-unit-converter
Application of C++11 User-Defined Literals to Handling Scientific Quantities, Number Representation and String Manipulation C++ Yes https://www.codeproject.com/Articles/447922/Application-of-Cplusplus-User-Defined-Literals-t
AS3Units ActionScript Yes https://github.com/erussell/AS3Units
Astropy Python Yes https://github.com/astropy/astropy
Automatic Conversion of Physical Units C# Yes https://www.codeproject.com/Articles/714545/Automatic-Conversion-of-Physical-Units
AutoUnits C++ Yes https://github.com/Fifty-Nine/AutoUnits
Aviation Tool VB .NET No https://sourceforge.net/projects/aviationtool/?source=directory
BeConverter C++ Yes https://bitbucket.org/Teknomancer/beconverter
BGConverter C++ No https://github.com/bugeaggeorge/BGConverter
BoostUnits C++ Yes https://www.boost.org/doc/libs/1_66_0/doc/html/boost_units.html
Buckingham Python Yes https://github.com/mdipierro/buckingham
C++ Unit Library C++ Yes https://sourceforge.net/projects/cppunitlibrary/?source=directory
C++ Units C++ Yes https://sourceforge.net/projects/cppunits/?source=directory
C0nv3rt3r C# No https://github.com/torifat/C0nv3rt3r
Caliper Java Yes https://github.com/point85/caliper
CaliperSharp C# Yes https://github.com/point85/CaliperSharp
Cerebro Converter JavaScript No https://github.com/KELiON/cerebro-converter
CF_Units Python Yes https://github.com/SciTools/cf_units
ChemicalA C++ Yes https://sourceforge.net/projects/chemicala/?source=directory
Chimp Python Yes https://github.com/mhetrerajat/chimp
Class-Measure Perl Yes https://github.com/bluefeet/Class-Measure
Comment-Units Rust No https://github.com/willi-kappler/comment_units
Complete Unit Conversion Sample in C# .NET C# Yes https://www.codeproject.com/Articles/22470/Complete-Unit-Conversion-Sample-in-C-NET
Computing with Units Java Yes https://sourceforge.net/projects/units-in-java/?source=directory
Constants and Units MatLab Yes https://github.com/mariomerinomartinez/constants_and_units
Converge Swift No https://github.com/daneden/Converge
Conversion PHP Yes https://github.com/abhimanyu003/conversion
Conversion Java No https://github.com/VaishnavRajesh/conversion
Conversion Java No https://github.com/SoftronixGlobal/Conversion
Conversion Java No https://github.com/2aredford/Conversion
Conversion C++ Yes https://github.com/simonmeaden/conversion
Conversion Java No https://github.com/ali-hamad/Conversion
Conversion Java No https://github.com/ironwire/Conversion
Conversion Calculator C++ Yes https://github.com/dtuivs/Converter
ConversionApp2 Java No https://github.com/dpinero/ConversionApp2
Conversionr R Yes https://github.com/alexnakagawa/conversionr
ConversionsApp Objective-C No https://github.com/JoeCortopassi/ConversionsApp
Convert Swift Yes https://github.com/danielbyon/Convert
Convert Python No https://github.com/sugarlabs/convert
Convert Units Java Yes https://github.com/ben-ng/convert-units
Convert-Quantities JavaScript Yes https://github.com/kendru/convert-quantities
Convert-units Ruby Yes https://github.com/tanvir002700/convert_unit
Convert.js JavaScript Yes https://github.com/YazilimMuhendisiyizBiz/convert.js
ConvertAll Python Yes https://sourceforge.net/projects/convertall/?source=directory
Convertee JavaScript Yes https://github.com/isquaredcreative/Convertee
Converter PHP Yes https://github.com/cartalyst/converter
Converter Swift No https://github.com/dhunten/Converter
Converter C++ Yes https://github.com/KerryL/Converter
Converter HTML No https://github.com/annaavanesyan/converter
Converter JavaScript No https://github.com/Urrby/Converter
Converter PureScript No https://github.com/moniyax/converter
Converter Java No https://github.com/NaOHman/Converter
Converter Java No https://github.com/sunil512/Converter
Converter Java No https://github.com/jessepasos/Converter
Converter JavaScript No https://github.com/zlargon/converter
Converter C# No https://github.com/sun-haha/Converter
Converter Java Yes https://sourceforge.net/projects/con-vert/?source=directory
Converter JavaScript No https://github.com/ziggy42/Converter
Converter Java No https://github.com/SurajPrasadd/Converter
Converter Python No https://github.com/hpjardon/converter
Converter Java No https://github.com/napnie/converter
Converter Clojure No https://github.com/andreasfrom/converter
Converter TypeScript Yes https://github.com/ialex90/Converter
Converter Python No https://github.com/XTremeRox/converter
Converter C++ Yes https://github.com/scruff3y/Converter
Converter Java No https://github.com/urielvan/converter
Converter HTML No https://github.com/AmitBuchnik/Converter
Converter Java Yes https://github.com/samWson/converter
Converter Java No https://github.com/atsang36/Unit_Converter
Converter C# No https://github.com/pfthroaway/Converter
Converter C++ Yes https://github.com/dtalaba/convertor
Converter Java Yes https://github.com/HanSolo/converter
Converter C++ No https://github.com/stevenharradine/Converter
Converter Java No https://github.com/khaldi-yass/Converter
Converter Objective-C No https://github.com/milkyNik/Converter
Converter Java No https://github.com/hirenj0009/converter
Converter Application Python No https://sourceforge.net/projects/converter-application/?source=directory
Converter_Classes Ruby No https://github.com/gschool-g5/converter_classes
ConverterApp C# Yes https://github.com/halezmo/ConverterApp
Convertinator C# Yes https://github.com/hartez/Convertinator
Converting a value to an SI Unit String C# Yes https://www.codeproject.com/Tips/414254/Converting-a-value-to-an-SI-unit-string
ConverTo C++ Yes https://sourceforge.net/projects/converto/?source=directory
Convertor C++ Yes https://github.com/mihaelateo/Convertor
Convertor PHP Yes https://github.com/olifolkerd/convertor
Convertoroid Java No https://github.com/abhii2028/Convertoroid
Convertr R Yes https://github.com/ropenscilabs/convertr
convertR R Yes https://github.com/colin-fraser/convertR
Coulomb Scala Yes https://github.com/erikerlandson/coulomb
cppDegRad C++ Yes https://github.com/grahamboree/cppDegRad
Cropio_Units_Converter C++ Yes https://github.com/cropio/cropio_units_converter
CSharp-UnitsOfMeasure C# No https://github.com/hediet/csharp-UnitsOfMeasure
CSUnits C# Yes https://github.com/cureos/csunits
Cubico C# Yes https://github.com/irperez/Cubico
Cue C++ No https://github.com/OMGtechy/Cue
Cuis-Smalltalk-Aconcagua Smalltalk Yes https://github.com/hernanwilkinson/Cuis-Smalltalk-Aconcagua
Currency Java No https://github.com/billthefarmer/currency
DakaUnitConverter Java Yes https://github.com/darrylfonseka/DakaUnitConverter
DDUnitConverter Objective-C Yes https://github.com/davedelong/DDUnitConverter
Decibel Units of Measurement with C# Framework C# Yes https://www.codeproject.com/Articles/1236193/Decibel-Units-of-Measurement-with-Csharp-Framework
Dftu C++ Yes https://github.com/triblatron/dftu
Dimanalyser Java Yes https://github.com/cymi/dimanalyser
Dimension-TF Haskell Yes https://github.com/nushio3/dimensional-tf
Dimensional Ruby Yes https://github.com/cch1/Dimensional
Dimensional Haskell Yes https://github.com/bjornbm/dimensional
DimensionalAnalysis Python No https://sourceforge.net/projects/dimensionalanalysis/?source=directory
Dimensioned Rust Yes https://github.com/paholg/dimensioned
DimPy Python Yes http://www.inference.org.uk/db410/dimpy/docs/docs/docs.html
Django-Unit-Field Python Yes https://github.com/kohout/django-unit-field
Easyunits-rs Rust No https://gitlab.com/imp/easyunits-rs
Efficient Scalars in Python Python Yes http://russp.us/scalar-python.htm
Efficient Scalars in Scala Scala Yes http://russp.us/scalar-scala.htm
EiffelUnits Eiffel Yes http://se.inf.ethz.ch/old/projects/markus_keller/EiffelUnits.html
Elixir Unit Converter Elixir Yes https://github.com/carturoch/ex_uc
Elm-tunits Elm No https://github.com/gyulalaszlo/elm-tunits
Elm-Units Elm No https://github.com/anfelor/elm-units
Engineering C# Yes https://github.com/zhofre/engineering
EngineeringCalculator C++ Yes https://sourceforge.net/projects/alwaysontopcalc/?source=directory
Enhancing User Experience - Part 1: A Simple Unit Converter Application C# Yes https://www.codeproject.com/Articles/6667/Enhancing-User-Experience-Part-A-Simple-Unit-Con
Esos C++ Yes https://sourceforge.net/projects/esos/?source=directory
Ethereumjs-units JavaScript No https://github.com/ethereumjs/ethereumjs-units
EveryConverter Java No https://sourceforge.net/projects/everyconverter/?source=directory
Fan measure Fan No https://bitbucket.org/qualidafial/fan-measure
Fhir.Metrics C# Yes https://github.com/FirelyTeam/Fhir.Metrics
Flowsnake JavaScript Yes https://github.com/Eldelshell/flowsnake
FP Units JavaScript No https://github.com/anthonydugois/fp-units
Frinj Clojure Yes https://github.com/martintrojer/frinj
Frins Scala Yes https://github.com/martintrojer/frins
FSharp.Units F# Yes https://github.com/putridparrot/FSharp.Units
FURY Fortran Yes https://github.com/szaghi/FURY
Gas Flow Unit Conversion Python No https://sourceforge.net/projects/gas-flow-unit-conversion/?source=directory
GenUnitApp JavaScript Yes https://github.com/halcwb/GenUnitApp
GenUnits F# Yes https://github.com/halcwb/GenUnits
GIM.Quantities C# Yes https://github.com/togakangaroo/GIM.Quantities
GNU Units C# Yes https://www.gnu.org/software/units/
GodSend PHP Yes https://sourceforge.net/projects/godsend/?source=directory
Gorilla Ruby Yes https://github.com/stephencelis/gorilla
Grobid-Quantities JavaScript No https://github.com/kermitt2/grobid-quantities
Groovy-Unitconverter Groovy No https://github.com/rhyolight/groovy-unitconverter
Gu.Units C# Yes https://github.com/JohanLarsson/Gu.Units
Hazpy.Unit-conversion Python No https://github.com/NOAA-ORR-ERD/hazpy.unit_conversion
HHUnitConverter Objective-C Yes https://github.com/HiveHicks/HHUnitConverter
Imp Converter C++ No https://sourceforge.net/projects/impconvert/?source=directory
Imperial & Metric Converter VB .NET No https://sourceforge.net/projects/exconverter/?source=directory
IMT.Units Java Yes https://github.com/imt-ag/imt.units-java
InkUnits Swift Yes https://github.com/angelsolaorbaiceta/InkUnits
Insect PureScript Yes https://github.com/sharkdp/insect
International System of Units Notation C# Yes https://www.codeproject.com/Tips/869419/International-System-of-Units-Notation
Java library and framework: quantity Java Yes https://sourceforge.net/projects/javaquantity/?source=directory
Java Measure Java Yes https://sourceforge.net/projects/javameasure/?source=directory
Java Numbers with Unit Java No https://sourceforge.net/projects/jnumwu/?source=directory
Java Unit Conversion Library Java No https://www.openhub.net/p/jucl
JavaMeasure Java Yes https://github.com/tkuebler/JavaMeasure
JC-Units Python Yes https://github.com/jason0x43/jc-units
JConvert Java Yes https://sourceforge.net/projects/jconvert/?source=directory
JFX Konwerter Java Yes https://sourceforge.net/projects/jfx-konwerter/?source=directory
JNum Java Yes https://github.com/attipaci/jnum
JQuantity: Precision Math Java Framework Java Yes https://sourceforge.net/projects/jquantity/?source=directory
JS-quantities JavaScript Yes https://github.com/gentooboontoo/js-quantities
JS-Quantities JavaScript No https://github.com/mugendi/js-quantities
JSR 275 Java Yes https://github.com/unitsofmeasurement/jsr-275/tree/master/src/main/java
JSR 363 Java Yes https://jcp.org/en/jsr/detail?id=363
Jsunitconverter JavaScript Yes https://github.com/jerodvenemafm/jsunitconverter
JUNitConv Java Yes https://github.com/duckler/JUnitConv
KingConverter JavaScript No https://github.com/ryanr1230/KingConverter
Ktunits Kotlin No https://github.com/sargunv/ktunits
Kuants Kotlin No https://github.com/evacchi/kuants
Lathexa Units JavaScript Yes https://github.com/lethexa/lethexa-units
Libquantify C++ Yes https://github.com/damianorenfer/libquantify
Libre Unit Conveter C# Yes https://sourceforge.net/projects/libreunitconverter/?source=directory
LibreEngineering Python Yes https://sourceforge.net/projects/libreeng/
Libunits C Yes https://sourceforge.net/projects/libunits/?source=directory
Lua-Physical Lua Yes https://github.com/tjenni/lua-physical
M2py Python/Matlab Yes https://github.com/caiorss/m2py
Maegor JavaScript Yes https://github.com/lukaskollmer/maegor
MagickScience C++ Yes https://github.com/Iarfen/MagickScience
Magnitude Python Yes https://github.com/juanre/magnitude
Magnitude Java Yes https://sourceforge.net/projects/magnitude/?source=directory
MAIA Unit Converter C++ Yes https://sourceforge.net/projects/maia-unit-conv/?source=directory
Maser JavaScript/Python Yes https://github.com/justinbangerter/maser
Math-units Perl Yes https://github.com/kenfox/Math-Units
Mather Java Yes https://github.com/icasdri/Mather
mcs::units C++ Yes https://sourceforge.net/projects/mcs-units/?source=directory
Measure Perl No https://github.com/bluefeet/Measure
Measure Swift No https://github.com/sdrpa/measure
Measure.js JavaScript No https://github.com/alnesjo/measure.js
MeasureBundle PHP Yes https://github.com/akeneo/MeasureBundle
Measured Ruby Yes https://github.com/Shopify/measured
Measurement Unit Conversion Library C# Yes https://www.codeproject.com/Articles/23087/Measurement-Unit-Conversion-Library
Measurement Unit Conversion Library C# Yes https://www.codeproject.com/Articles/662335/Measurement-Unit-Conversion-Library
Measurement with units C++ No https://github.com/AndrewWasHere/measurements_with_units
Measurement_Converter Java No https://github.com/KinYee/Measurement_Converter
Measurement.js JavaScript Yes https://github.com/Philzen/measurement.js
MeasurementConverter Java Yes https://github.com/SBrooks75/MeasurementConverter
Measurements PHP Yes https://github.com/marfurt/measurements
Measurements Ruby Yes https://github.com/Krustal/Measurements
Measures and Units C# No https://sourceforge.net/projects/measure/?source=directory
Measures with Dimensions Racket Yes https://github.com/AlexKnauth/measures-with-dimensions
Memory_Units Rust No https://github.com/pepyakin/memory_units
Mensura Python No https://github.com/ypsilus/mensura
Meshy-quantities Python No https://bitbucket.org/meshy/meshy-quantities/src
Meteor-Quantities JavaScript Yes https://github.com/luzlab/meteor-quantities
Metiri JavaScript Yes https://github.com/GCheung55/metiri
Metric Java Yes https://github.com/gnapse/metric
Metric Rust Yes https://github.com/coder543/metric
Metric Nim Yes https://github.com/mjendrusch/metric
Mezur JavaScript Yes https://github.com/guyisra/mezur
MilesMeter Swift No https://github.com/mirokolodii/milesmeter
Misu Python Yes https://github.com/cjrh/misu
MKUnits Swift Yes https://github.com/michalkonturek/MKUnits
Natu Python Yes https://github.com/kdavies4/natu
NGenericDimensions C# Yes https://github.com/MafuJosh/NGenericDimensions
NGunits Java Yes https://github.com/erussell/ngunits
NGX-UOM JavaScript Yes https://github.com/catellanir/ngx-uom
Nim-Units Nim No https://github.com/def-/nim-units
Node-units JavaScript Yes https://github.com/brettlangdon/node-units
NUCOS JavaScript No https://github.com/NOAA-ORR-ERD/NUCOS
NumericalChameleon Java Yes https://sourceforge.net/projects/numchameleon/?source=directory
NumericalUnits Python Yes https://github.com/sbyrnes321/numericalunits
NUnitConverter C# No http://jamesnewkirk.typepad.com/posts/nunit_converter_v11.html
o2scl C Yes https://github.com/awsteiner/o2scl
Ocalm-units OCalm No https://github.com/pelzlpj/ocaml-units
Open.Measuring TypeScript No https://github.com/electricessence/Open.Measuring
ParamPool Python Yes https://github.com/hplgit/parampool
ParamPy Python Yes https://github.com/matthewwardrop/python-parampy
PHP Unit Conversion PHP Yes https://github.com/pimlie/php-unit-conversion
PHP Unit Converter PHP No https://sourceforge.net/projects/phpunitconvert/?source=directory
PHP Units of Measure PHP Yes https://github.com/PhpUnitsOfMeasure/php-units-of-measure
PHP-Conversion PHP Yes https://github.com/crisu83/php-conversion
PHP-Units PHP Yes https://github.com/hiqdev/php-units
PHPConverter PHP Yes https://github.com/chapmang/PHPConverter
PHPMeasures PHP Yes https://github.com/dcabanaw/phpMeasures
Phriky-Units Python Yes https://github.com/unl-nimbus-lab/phriky-units
Phys-Types C++ Yes https://github.com/akubera/phys_types
Physcon Python Yes https://github.com/georglind/physcon
Physical C++ Yes https://sourceforge.net/projects/physical/?source=directory
Physical C++ Yes https://github.com/olsonse/physical
Physical Math Python Yes https://github.com/matthagy/physmath
Physical Measure C# Yes https://github.com/KiloBravoLima/PhysicalMeasure
Physical Quantities Smalltalk/C# Yes https://github.com/timdetering/PhysicalQuantities
Physical Units for Matlab MatLab Yes https://github.com/sky-s/physical-units-for-matlab
Physical-Quantities Python Yes https://github.com/hplgit/physical-quantities
Physical-Quantities Haskell No https://github.com/mtesseract/physical-quantities
Physical-Units Scala No https://github.com/ppiotrow/physical-units
PhysicalQuantities Python Yes https://github.com/juhasch/PhysicalQuantities
PhysicalQuantities C# No https://github.com/KorzunK/PhysicalQuantities
PhysicalQuantities Common Lisp Yes https://github.com/mrossini-ethz/physical-quantities
PhysicalQuantities C# Yes https://github.com/timdetering/PhysicalQuantities
PhysicalQuantities Python No https://github.com/ppfaff/PhysicalQuantities
PhysicalQuantities C# No https://github.com/Traquina/PhysicalQuantities
PhysicalQuantities Haskell Yes https://github.com/fehu/PhysicalQuantities
PhysicalQuantities Python No https://github.com/d0cod3r/physicalQuantitis
PhysicalUnits F# No https://github.com/kainous/PhysicalUnits
PhysicalUnits C++ Yes https://sourceforge.net/projects/physicalunits/?source=directory
PhysicalValue Swift Yes https://github.com/antonvmironov/PhysicalValue
Physics Python Yes https://bitbucket.org/hppavilion1/physics
PHYSICS Multiple Yes http://sergey-l-gladkiy.narod.ru/index/physics/0-14
Physics-Measurement JavaScript Yes https://github.com/victorpotasso/physics-measurement
Physikal Kotlin Yes https://github.com/unitsofmeasurement/Physikal
Physikal Kotlin No https://github.com/Tenkiv/Physikal
PhysUnits C++ Yes https://github.com/martinmoene/PhysUnits-CT-Cpp11
PhysUnits C++ No https://github.com/rdlabspl/PhysUnits
Pint Python Yes https://github.com/hgrecco/pint
Portable Unit Converter JavaScript Yes https://sourceforge.net/projects/puc/?source=directory
PPX_Measure OCalm Yes https://github.com/xvw/ppx_measure
Praktool Python Yes https://github.com/zombofant/praktool
PreciseUnitConverter JavaScript Yes https://github.com/bumxu/PreciseUnitConverter
ProgParam C++ Yes https://github.com/qPCR4vir/ProgParam
PUMA Repository Pascal No https://sourceforge.net/projects/puma-repository/?source=directory
Punits - Pluggable units C Yes https://sourceforge.net/projects/punits/?source=directory
puny Python Yes https://sourceforge.net/projects/puny/?source=directory
Purescript-Quantities PureScript Yes https://github.com/sharkdp/purescript-quantities
Purescript-Units PureScript Yes https://github.com/fluffynukeit/purescript-units
PyPhys Class Library Python Yes https://sourceforge.net/projects/pyphys/?source=directory
PyQuantity Python Yes https://github.com/gabbpuy/PyQuantity
Python Quantities Python Yes https://github.com/python-quantities/python-quantities
Python Unit Conversion Library Python Yes https://sourceforge.net/projects/pythonconvert/?source=directory
Python-Physical Python Yes https://github.com/EdwinChan/python-physical
Python-Units-Of-Measure Python Yes https://github.com/katerina7479/python-units-of-measure
PythonUnitConverter Python Yes https://github.com/Aaron1011/PythonUnitConverter
PyUnitConverter Python Yes https://github.com/jyri78/PyUnitConverter
Pyvalem Python Yes https://github.com/xnx/pyqn
qMetrics C++ Yes https://launchpad.net/qmetrics
QSAS C++ No https://sourceforge.net/projects/qsas/?source=directory
QtUnits C++ Yes https://github.com/hrobeers/QtUnits
Quan C++ Yes https://sourceforge.net/projects/quan/?source=directory
Quant Python No https://github.com/colecocomo/quant
Quantified Ruby Yes https://github.com/Shopify/quantified
Quantify Ruby Yes https://github.com/spatchcock/quantify
Quantiphy Python Yes https://github.com/KenKundert/quantiphy
Quantities Haskell Yes https://github.com/jdreaver/quantities
Quantities Swift Yes https://github.com/BradLarson/Quantities
Quantities R Yes https://github.com/r-quantities/quantities
Quantities MatLab Yes https://github.com/mikofski/Quantities
Quantities C++ Yes https://github.com/djbarker/quantities
Quantities Haskell No https://github.com/mtesseract/quantities
Quantities Batchfile Yes https://github.com/greatfriends/Quantities
Quantities JavaScript No https://github.com/jdrew1303/quantities
Quantities C# Yes https://github.com/atmoos/Quantities
Quantities Idris Yes https://github.com/timjb/quantities
Quantities D Yes https://github.com/biozic/quantities
Quantities C++ Yes https://sourceforge.net/projects/quantity/?source=directory
Quantities-Comparison Python No https://github.com/tbekolay/quantities-comparison
Quantities, Units, and Values: An Object Oriented Implementation C Yes https://www.codeproject.com/Articles/216191/Quantities-Units-and-Values-an-Object-Oriented-Imp
Quantities.jl Julia No https://github.com/ElOceanografo/Quantities.jl
Quantities.net C# Yes https://sourceforge.net/projects/quantitiesnet/
QuantitiesLib C# No https://github.com/isabellaalstrom/QuantitiesLib
Quantity Haskell No https://github.com/irreverent-pixel-feats/quantity
Quantity Ruby Yes https://github.com/bhuga/quantity
Quantity PHP Yes https://github.com/phospr/quantity
Quantity Ruby Yes https://github.com/aportnov/quantity
Quantity Clojure Yes https://github.com/spellman/quantity
Quantity System C# Yes https://github.com/ibluesun/QuantitySystem
Quantity Types C# Yes https://github.com/objorke/QuantityTypes
Quantity.Net C# Yes https://github.com/bcachet/Quantity.Net
QUDAL C++ Yes https://sourceforge.net/projects/qudal/?source=directory
Quick Unit Converter Java Yes https://sourceforge.net/projects/qunitconverter/?source=directory
Rails-Units Ruby No https://github.com/scpike/rails-units
RealizedQuantities Python No https://github.com/BayerSe/RealizedQuantities
Red-units Red Yes https://gitlab.com/maxvel/red-units
RedStar.Amounts C# Yes https://github.com/petermorlion/RedStar.Amounts/
Rink Rust Yes https://github.com/tiffany352/rink-rs
RockUnits C# Yes https://github.com/gareth-reid/RockUnits
Rssfiz Java No https://sourceforge.net/projects/rssfiz/?source=directory
Ruby Units Ruby Yes https://github.com/olbrich/ruby-units
Ruby-Units Ruby Yes https://github.com/davearonson/Ruby-Units
Run-Convert JavaScript No https://github.com/cdbusby/run-convert
SBUnits Swift Yes https://github.com/EBGToo/SBUnits
Scala-Quantities Scala No https://github.com/Lastik/scala-quantities
Scala-units Scala Yes https://github.com/bwkimmel/scala-units
ScalaQuantity Scala Yes https://github.com/zzorn/ScalaQuantity
ScalaU Scala Yes https://github.com/adrianfr/scalau
Scale Swift Yes https://github.com/onmyway133/Scale
Scaler Shell Yes https://github.com/emugel/scaler
Scientific Javascript JavaScript No https://github.com/gkjohnson/scientific-javascript
Scientific Library C++ No https://sourceforge.net/projects/scientificlib/?source=directory
ScientificQuantities C++ Yes https://github.com/nourani/ScientificQuantities
Scimath Python Yes https://github.com/enthought/scimath
SI C++ No https://github.com/erdavila/SI
SI -- A Scala Library of Units of Measurement Scala Yes https://gitlab.com/h2b/SI
SI-Units Java Yes https://github.com/unitsofmeasurement/si-units
SIConv Haskell Yes https://github.com/owainlewis/conventional-si-unit-converter
Silphid.Unity C# No https://github.com/silphid/silphid.unity
SIMConverter C# Yes https://sourceforge.net/projects/simconverter/?source=directory
Simple-Unit-Converter JavaScript No https://github.com/smtaydemir/simple-unit-converter
Simple.Units C# Yes https://github.com/oriches/Simple.Units
SimpleMeasurementConverter Java Yes https://github.com/michaelstoops/SimpleMeasurementConverter
SimpleUnitConverter C Yes https://launchpad.net/simpleunitconverter
SIUnits (#1) Haskell Yes https://github.com/joewkr/SIUnits
SIUnits (#2) C++ No https://github.com/Jajauma/SIUnits
SIUnits.jl Julia No https://github.com/Keno/SIUnits.jl
SIUnitX TeX Yes https://github.com/josephwright/siunitx
Sius Java Yes https://github.com/mbe24/sius
Smart Units Sidef Yes https://github.com/trizen/smart-units
Spectroscopist's Energy Converter C No https://sourceforge.net/projects/specon/?source=directory
Squants Scala Yes https://github.com/typelevel/squants
Sundew.Quantities C# Yes https://github.com/hugener/Sundew.Quantities
Superquants Scala Yes https://github.com/rudogma/scala-superquants
SwiftMeasurement Swift Yes https://github.com/ken0nek/SwiftMeasurement
SY Ruby Yes https://github.com/boris-s/sy
tConverter PHP No https://github.com/tankotun/tConverter
TCX Unit Conversion Library C++ Yes https://www.codeproject.com/Articles/103/TCX-Unit-Conversion-Library
TempConvert Python No https://github.com/rootinchase/tempconvert
Temperature Go No https://github.com/yanndr/temperature
Temperature Unit Converter C No https://sourceforge.net/projects/temp-unit-converter/?source=directory
TemperatureConverter Python No https://github.com/bobo333/TemperatureConverter
The Quantity Library C++ No http://home.xnet.com/~msk/quantity/quantity.html
The Units of Measure Library C++ Yes https://sourceforge.net/projects/tuoml/
Trevor JavaScript No https://github.com/ozgrozer/trevor
TundraMeasure.java Java Yes https://github.com/Permafrost/TundraMeasure.java
UConverter Java Yes https://sourceforge.net/projects/uconverter/?source=directory
UDUnits Julia Yes https://github.com/Alexander-Barth/UDUnits.jl
UDUNITS-2 C Yes https://github.com/Unidata/UDUNITS-2
Udunitspy Python No https://github.com/blazetopher/udunitspy
UltimateCalculator Java No https://sourceforge.net/projects/ultimatecalculator/?source=directory
Umpy Python Yes https://github.com/perdixsw/umpy
Uncodium.Units F# Yes https://github.com/stefanmaierhofer/Uncodium.Units
UNeedIT Converter C# Yes https://sourceforge.net/projects/uneedconverter/?source=directory
UniCon Java No https://github.com/davoraleksic/UniCon
Unisum Vue No https://github.com/askhat/unisum
Unit Ruby No https://github.com/christinach/unit
Unit C++/CMake/Python Yes https://github.com/njoy/unit
Unit PHP Yes https://github.com/pounard/Unit
Unit JavaScript Yes https://github.com/smartcar/unit
Unit Go No https://github.com/kormoc/unit
Unit Go Yes https://github.com/martinlindhe/unit
Unit Java Yes https://bitbucket.org/hansolo/unit
Unit VB .NET Yes https://github.com/AdamSpeight2008/Unit
Unit PHP No https://github.com/komparu/unit
Unit HTML No https://github.com/Bingde/unit
Unit API Java Yes https://github.com/unitsofmeasurement/unit-api
Unit Conversion Wox Plugin Python/PowerShell No https://github.com/rpalo/wox-unit-converter
Unit Conversions in C#/WPF C# Yes https://www.codeproject.com/Articles/30569/Unit-Conversions-in-C-WPF
Unit Converter C No https://github.com/nithjino/UnitConverter
Unit Converter Scratch Yes https://sourceforge.net/projects/unitconverter12/?source=directory
Unit Converter Java No https://sourceforge.net/projects/unitsconverter/?source=directory
Unit Converter Python Yes https://sourceforge.net/projects/unit-converter/?source=directory
Unit Converter REBOL Yes https://sourceforge.net/projects/tbunitconverter/?source=directory
Unit Converter Application Java No https://bitbucket.org/cpresley/unit-converter-application
Unit Conveter C# Yes https://sourceforge.net/projects/unitconversion/?source=directory
Unit Conveter using PHP and HTML PHP No https://sourceforge.net/projects/stgmunitconvert/?source=directory
Unit Management Framework Java Yes https://sourceforge.net/projects/quantitymanager/?source=directory
Unit of Measure Library for .NET C# Yes https://www.codeproject.com/Articles/404573/Units-of-Measure-Library-for-NET
Unit of Measure Validator for C# C# Yes https://www.codeproject.com/Articles/413750/Units-of-Measure-Validator-for-Csharp
Unit Var Python Yes https://sourceforge.net/projects/unitvar/?source=directory
Unit_Conversion Ruby Yes https://github.com/eternal44/unit_conversion
Unit_Conversion Python Yes https://github.com/bastihaase/unit_conversion
Unit_Converter Ruby No https://github.com/samuels410/unit_converter
Unit_Soup Ruby Yes https://github.com/rutvij47/unit_soup
Unit-Conversion PHP No https://github.com/h4kuna/unit-conversion
Unit-Conversion JavaScript Yes https://github.com/srimanthk/unit-conversion
Unit-converter PHP Yes https://github.com/jordanbrauer/unit-converter
Unit-Converter JavaScript No https://github.com/jgalla/unit-converter
Unit-Converter JavaScript Yes https://github.com/GTLook/Unit-Converter
Unit-converter Python Yes https://bitbucket.org/brayvasq/unit-converter
Unit-Converter JavaScript Yes https://github.com/TheMarco/Unit-Converter
Unit-converter JavaScript No https://bitbucket.org/sergespaolonzi/unit-converter
Unit-Converter JavaScript No https://github.com/war1025/Unit-Converter
Unit-converter Java No https://github.com/ThanasiG/unit-converter
Unit-Converter Java Yes https://github.com/AmitKumarSah/Unit-Converter
Unit-Converter PHP Yes https://github.com/b-sebastian/unit-converter
Unit-Converter C++ Yes https://github.com/mikeleppane/Unit-Converter
Unit-Converter C++ No https://github.com/BoboTiG/unit-converter
Unit-Converter JavaScript Yes https://github.com/MaicolBen/unit-converter
Unit-Converter.js JavaScript No https://github.com/angeshpokharel/unit-converter.js
Unit-formula Common Lisp Yes https://github.com/Ramarren/unit-formula
Unit.py Python Yes https://github.com/fabian0010/Unit.py
Unit.styl JavaScript Yes https://github.com/diessica/unit.styl
UnitComboLib C# No https://github.com/Dirkster99/UnitComboLib
UnitConversion Objective-C Yes https://github.com/unixpickle/UnitConversion
UnitConversion C# Yes https://github.com/gkampolis/UnitConversion
UnitConversion Python Yes https://github.com/UnitConversion/unitConversion
UnitConversion C# Yes https://github.com/Mecteral/UnitConversion
UnitConversion Java No https://github.com/yadavparmatma/UnitConversion
UnitConversion Java Yes https://github.com/yfl007/UnitConversion
UnitConversion C# No https://github.com/vsooraj/UnitsConversion
UnitConversionLib C# Yes https://www.codeproject.com/Articles/787029/UnitConversionLib-Smart-Unit-Conversion-Library-in
UnitConvert JavaScript Yes https://github.com/agnoster/unitology
UnitConverter Java Yes https://github.com/nevack/UnitConverter
UnitConverter PHP Yes https://github.com/nfraz007/UnitConverter
UnitConverter Java No https://github.com/sunilthalore/UnitConverter
UnitConverter Objective-C No https://github.com/basicsbeauty/UnitConverter
UnitConverter C# No https://github.com/github-ganesh/UnitConverter
UnitConverter Swift No https://github.com/SwiftEducation/UnitConverter
UnitConverter C++ No https://github.com/Shaddox/UnitConverter
UnitConverter Java Yes https://github.com/MarioDudjak/UnitConverter
UnitConverter Python Yes https://github.com/mattgd/UnitConverter
UnitConverter Java No https://github.com/sommukhopadhyay/UnitConverter
UnitConverter Java Yes https://github.com/impateljay/UnitConverter
UnitConverter Java No https://github.com/MarcKuniansky/UnitConverter
UnitConverter Java No https://github.com/Ideally/UnitConverter
UnitConverter Java No https://github.com/fnk0/UnitConverter
UnitConverter Python No https://github.com/Demoleas715/UnitConverter
Unitconverter-Android Java Yes https://github.com/dbrant/unitconverter-android
UnitConverter.htm JavaScript Yes https://github.com/iterami/UnitConverter.htm
UnitConverterLibrary C# No https://bitbucket.org/MADc0d3r/unitconverterpublic
UnitConverterUltimate Java Yes https://github.com/physphil/UnitConverterUltimate
UnitConverterWin C Yes https://github.com/NikolaiTyrMDS/UnitConverterWin
Unitful.jl Julia Yes https://github.com/ajkeller34/Unitful.jl
UnitKit Swift Yes https://github.com/otaviocc/UnitKit
UnitMan C# Yes https://github.com/mbeloshapkin/UnitMan
UnitManipulationLibrary C++ Yes https://github.com/OuaisBla/UnitManipulationLibrary
Unitmaster C++ No https://github.com/oswjk/unitmaster
UnitOfMeasure (#1) C# Yes https://github.com/Chef-Code/UnitOfMeasure
UnitOfMeasure (#2) Scala Yes https://github.com/ricemery/unitofmeasure
UnitParser C# Yes https://www.codeproject.com/Articles/1211504/UnitParser
Units C++ Yes https://github.com/nholthaus/units
Units Python No https://github.com/DanielSank/units
Units Go Yes https://github.com/zn8nz/units
Units C++ No https://gitlab.com/eclufsc/eda/units
Units Go No https://bitbucket.org/ede/units
Units Python No https://bitbucket.org/johanhake/units
Units Rust Yes https://github.com/Boddlnagg/units
Units Scala Yes https://github.com/nestorpersist/units
Units PHP Yes https://github.com/ARCANEDEV/Units
Units Go Yes https://github.com/antha-lang/units
Units PHP Yes https://github.com/marando/Units
Units Python Yes https://bitbucket.org/adonohue/units
Units Elm No https://github.com/irpagnossin/units
Units Haskell Yes https://github.com/goldfirere/units
Units JavaScript No https://github.com/heygrady/Units
Units Go No https://github.com/alecthomas/units
Units Scala Yes https://github.com/KarolS/units
Units Java Yes https://github.com/xxv/Units
Units PHP No https://github.com/anstag/units
Units C# No https://github.com/cardassianscot/Units
Units C++ Yes https://github.com/lonkamikaze/units
Units Swift Yes https://github.com/chrisjeane/Units
Units Java Yes https://github.com/SamCarlberg/units
Units PHP Yes https://github.com/rmasters/units
Units Tcl Yes https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/units/units.html
Units Ruby Yes https://github.com/woahdae/units
Units R Yes https://cran.r-project.org/web/packages/units/index.html
Units Haskell Yes https://hackage.haskell.org/package/units
Units C# Yes https://github.com/engineers-tools/Units
Units Go Yes https://github.com/smyrman/units
Units C++ Yes https://github.com/tonypilz/units
Units Multiple Yes https://github.com/saroad2/units
Units JavaScript Yes https://github.com/dohliam/units
Units C# Yes https://github.com/LabyrinthApps/Units
Units 2 Clojure Yes https://github.com/mfey/units2
Units and Measurements Racket Yes https://github.com/Metaxal/measures
Units and measures for C++ 11 C++ Yes https://www.codeproject.com/Articles/1088293/Units-and-measures-for-Cplusplus
Units by Stak Digital JavaScript Yes https://github.com/stak-digital/units
Units Conversion Library C No https://sourceforge.net/projects/units/?source=directory
Units D D Yes https://github.com/nordlow/units-d
Units of Measure C# Yes https://archive.codeplex.com/?p=unitsofmeasure
Units of Measure Kotlin Yes https://github.com/kunalsheth/units-of-measure
Units of Measure Prototype Haskell Yes https://github.com/adamgundry/uom-prototype
Units of Measurement C# Yes https://github.com/mangh/unitsofmeasurement
Units of measurement for Ada Ada Yes https://sourceforge.net/projects/unitsofmeasurementforada/?source=directory
Units of Measurement Systems Java Yes https://github.com/unitsofmeasurement/uom-systems
Units of measurement types in C++ C++ No https://www.codeproject.com/Articles/791511/Units-of-measurement-types-in-Cplusplus-Using-comp
Units_of_measure C++ Yes https://github.com/Skeen/units_of_measure
Units-api PHP Yes https://github.com/shrimpza/units-api
Units-Converter C# No https://github.com/kolesnikova745/units-converter
Units-of-Measure Scala Yes https://github.com/Mononofu/Units-of-Measure
Units-of-Measure Java No https://github.com/timroejr/2.05-Units-of-Measurement
Units-parser Haskell No https://github.com/adamgundry/units-parser
Units-Ruby Ruby Yes https://github.com/bfoz/units-ruby
Units-System Ruby Yes https://github.com/jgoizueta/units-system
Units-v2 C++ Yes https://github.com/Corristo/units-v2
Units.jl Julia No https://github.com/sclereid/Units.jl
Units.jl Julia Yes https://github.com/autocorr/Units.jl
Units.js JavaScript Yes https://github.com/jairtrejo/units.js
Units4j Java No https://github.com/echocat/units4j
UnitsC++ C++ Yes https://sourceforge.net/projects/unitscpp/?source=directory
UnitsDotNet F# No https://github.com/benhamner/UnitsDotNet
UnitsKit Objective-C Yes https://github.com/stevemoser/UnitsKit
UnitsNet C# Yes https://github.com/angularsen/UnitsNet
UnitsOfMeasure C++ No https://github.com/ing200086/UnitsOfMeasure
UnitsOfMeasure C# Yes https://github.com/capnmidnight/UnitsOfMeasure
UnitsOfMeasure C++ No https://github.com/printfn/UnitsOfMeasure
UnitsOfMeasureBundle PHP Yes https://github.com/PhpUnitsOfMeasure/UnitsOfMeasureBundle
UnitsOfMeasurement C++ No https://github.com/grafwolg/UnitsOfMeasurement
Unitwise Ruby Yes https://github.com/joshwlewis/unitwise
Unitz JavaScript Yes https://github.com/ClickerMonkey/unitz
Unum Python Yes https://bitbucket.org/kiv/unum
Unum Python Yes https://sourceforge.net/projects/unum/?source=directory
Unum Python Yes https://bitbucket.org/kiv/unum
Uom Ruby Yes https://github.com/caruby/uom
UOM Ruby Yes https://github.com/madriska/uom
UOM Conversion Library Java Yes https://sourceforge.net/projects/uomcl/?source=directory
UOM-Domain Java Yes https://github.com/unitsofmeasurement/uom-domain
UOM-Plugin Haskell Yes https://github.com/adamgundry/uom-plugin
Uom.Dart Dart Yes https://github.com/damondouglas/uom.dart
Using physical quantities and units of measure in C# programs C# Yes https://www.codeproject.com/Articles/1066008/Using-physical-quantities-and-units-of-measurement
Validation Dimensions of Physical Quantities .NET C# Yes https://www.codeproject.com/Tips/1005796/Validation-Dimensions-of-Physical-Quantities-NET
ValueWithUnit C# Yes https://github.com/vbfox/ValueWithUnit
Vandelay C++ Yes https://github.com/HaikuArchives/Vandelay
VUnits Java Yes https://github.com/vaslabs/vunits
Web Unit Converter C# Yes https://sourceforge.net/projects/web-unit-converter/?source=directory
Winds Units Converter C++ No https://sourceforge.net/projects/windunitsconver/?source=directory
Working with Units and Amounts C# Yes https://www.codeproject.com/script/Articles/ListVersions.aspx?aid=611731
XamConverter C# Yes https://github.com/brminnick/XamConverter
Xiny Go Yes https://github.com/bcicen/xiny
XVertR - eXtensible units conVERTeR JavaScript No https://sourceforge.net/projects/xvertr/?source=directory