Self hosted related to geospatial, eg, OSRM, OSM.
https://www.maptiler.com/, Mapping platform designed for quick publishing of zoomable maps online for web applications, mobile devices and 3D visualisations. Required purchase license to use for commercial.
- OSM.
https://switch2osm.org/, Serving your own tiles.
- OSRM.
http://project-osrm.org/, Open Source Routing Machine, high-performance routing engine for shortest paths in road networks.