- [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`
- [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`
- [Orion](https://github.com/LINKIWI/orion-web) - Powerful OwnTracks API-compliant location data visualization frontend for the web. ([Demo](https://linkiwi.github.io/orion-web/)) `MIT``Python/Nodejs`
- [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`
- [TileServer GL](https://tileserver.readthedocs.io/) - Vector and raster maps with GL styles. Server side rendering by Mapbox GL Native. Map tile server for Mapbox GL JS, Android, iOS, Leaflet, OpenLayers, GIS via WMTS, etc. ([Source Code](https://github.com/maptiler/tileserver-gl)) `BSD-2-Clause``Nodejs`
- [TileServer PHP](https://www.maptiler.com/server/) - Serve map tiles from any PHP hosting. ([Source Code](https://github.com/maptiler/tileserver-php)) `BSD-2-Clause``PHP`
KieranRobson
2 years ago