Update README.md

- added IO cellset in PDK contents section
- added 'tool list' section

Signed-off-by: Sergei Andreev <116548619+sergeiandreyev@users.noreply.github.com>

README.md

@@ -23,7 +23,7 @@ is not intended to be used for production at this moment.
 # SG13G2 Process Node
 
 SG13G2 is a high performance BiCMOS technology with a 0.13 μm CMOS process. It contains bipolar
-devices based on SiGe:C npn-HBT's with up to 350 GHz transient frequency ($f_T$) and 450 GHz oscillation
+devices based on SiGe:C npn-HBT's with up to 350 GHz transition frequency ($f_T$) and 450 GHz oscillation
 frequency ($f_{max}$). This process provides 2 gate oxides: A thin gate oxide for the 1.2 V digital logic and a thick
 oxide for a 3.3 V supply voltage. For both modules NMOS, PMOS and isolated NMOS transistors are
 offered. Further passive components like poly silicon resistors and MIM capacitors are available. The
@@ -35,9 +35,14 @@ backend option offers 5 thin metal layers, two thick metal layers (2 and 3 μm t
     * CDL
     * GDSII
     * LEF, Tech LEF
-    * SPICE Netlist
     * Liberty
+    * SPICE Netlist
     * Verilog
+* IO cellset
+    * GDSII
+    * LEF
+    * Liberty (dummy)
+    * SPICE Netlist
 * SRAM cellset
     * CDL
     * GDSII
@@ -46,11 +51,12 @@ backend option offers 5 thin metal layers, two thick metal layers (2 and 3 μm t
     * Verilog
 * Primitive devices
     * GDSII
-* KLayout layer property and tech files
-* KLayout DRC rules (minimal set)
-* KLayout PyCells
-    * initial version of the wrapper API
-    * sample cells
+* KLayout tool data:
+    * layer property and tech files
+    * DRC rules (minimal set)
+    * PyCells
+       * initial version of the wrapper API
+       * sample cells
 * Pcells (for reference only) `libs.tech/pycell`
 * MOS/HBT/Passive device models for ngspice/Xyce
 * xschem: primitive device symbols, settings and testbenches
@@ -59,6 +65,25 @@ backend option offers 5 thin metal layers, two thick metal layers (2 and 3 μm t
 * MOS/HBT Measurements in MDM format
 * Project Roadmap Gantt chart
 
+## Supported EDA Tools
+
+* ngspice
+    * Download: https://ngspice.sourceforge.io/download.html
+    * Source: https://sourceforge.net/p/ngspice/ngspice/ci/master/tree
+* Xyce
+    * Download: https://xyce.sandia.gov/downloads/executables
+    * Source: https://github.com/Xyce/Xyce
+* xschem
+    * Source: https://github.com/StefanSchippers/xschem
+* Qucs-S
+    * Download: https://ra3xdh.github.io
+    * Source: https://github.com/ra3xdh/qucs_s
+* KLayout
+    * Download: https://www.klayout.de/build.html
+    * Source: https://github.com/KLayout/klayout
+* OpenEMS
+    * Source: https://github.com/thliebig/openEMS-Project
+
 ## Contributing
 
 Thank you for considering contributing to IHP Open Source PDK project on GitHub! To get started, please fork the **'dev'** branch of the repository and create a new branch for your contributions. Whether you're interested in code improvements, bug fixes, feature additions, or documentation enhancements, your input is invaluable. Please ensure your code adheres to [GitHub coding standards](https://github.com/git/git/blob/master/Documentation/CodingGuidelines) and accompanies appropriate tests. Please see the [Contributing file](CONTRIBUTING.md) for additional details. We appreciate your support and look forward to collaborating with you!