- [Nominatim](https://nominatim.org/) - Server application for geocoding (address -> coordinates) and reverse geocoding (coordinates -> address) on OpenStreetMap data. ([Source Code](https://github.com/osm-search/Nominatim)) `GPL-2.0``C`
- [Open Source Routing Machine (OSRM)](http://project-osrm.org/) - High performance routing engine designed to run on OpenStreetMap data and offering an HTTP API, C++ library interface, and Nodejs wrapper. ([Demo](https://map.project-osrm.org/), [Source Code](https://github.com/Project-OSRM/osrm-backend)) `BSD-2-Clause``C++`
- [OpenGTS](http://www.opengts.org/) - Entry-level fleet tracking system. Supports variety of tracking devices and protocols. Comes with rich web-interface and reporting features. ([Demo](http://track.opengts.org/track/Track), [Source Code](https://sourceforge.net/projects/opengts/files/server-base/)) `Apache-2.0``Java`
- [OpenRouteService](https://openrouteservice.org/) - Selfhosted route service with directions, isochrones, time-distance matrix, route optimization, etc. ([Demo](https://openrouteservice.org/dev/#/api-docs/introduction), [Source Code](https://github.com/GIScience/openrouteservice)) `GPL-3.0``Docker/Java`
- [OpenStreetMap](https://www.openstreetmap.org/) - Collaborative project to create a free editable map of the world. ([Source Code](https://github.com/openstreetmap/openstreetmap-website), [Clients](https://wiki.openstreetmap.org/wiki/Software)) `GPL-2.0``Ruby`
- [OpenTripPlanner](https://www.opentripplanner.org/) - Multimodal trip planning software based on OpenStreetMap data and consuming published GTFS-formatted data to suggest routes using local public transit systems. ([Source Code](https://github.com/opentripplanner/OpenTripPlanner)) `LGPL-3.0``Java/Javascript`
- [OwnTracks Recorder](https://github.com/owntracks/recorder) `⚠` - Store and access data published by [OwnTracks](https://owntracks.org/) location tracking apps. `GPL-2.0``C/Lua`