Traccar GPS Tracking System
Accurately Locate Smartphones using Social Engineering
Geocode addresses to coordinates
Open Source Routing Machine - C++ backend
Build your own GPS unit
Viking is a free/open source program to manage GPS data
Simple GPS tracking server
GPS log file viewer and analyzer
GPS track editor for editing tracks and planning (multiple) day tours
A Guide of the Trees of Barcelona City
... the open-source glide computer
A Matlab software to estimate Euler pole parameters
Transport coordinate between earth(WGS-84) and mars in china(GCJ-02)
Open source system for GPS tracking devices
An interactive tool for GNSS position time series analysis
Create, edit view GPX tracks (in the background - online maps)
Minimalistic wide-open GPS-locator/tracker
NMEA 0183 library for Java
Advanced mission simulation and analysis tool