Cross platform (lin/win/mac) geographical information system (GIS)
Open Source Routing Machine - C++ backend
Traccar GPS Tracking System
Open OSINT stack for monitoring, analysis, and risk detection
GWC is a tile server and caching proxy written in Java
Toolkit for working with and mapping geospatial data
Open source system for GPS tracking devices
Minimalistic wide-open GPS-locator/tracker
Multiplatform Ham Radio APRS and Mapping Program
Tile Cache Server
GPSBabel converts and transfers data like waypoints, tracks & routes.