Traccar GPS Tracking System
Geocode addresses to coordinates
Open Source Routing Machine - C++ backend
Build your own GPS unit
Map location picker component for Android
Viking is a free/open source program to manage GPS data
GPS log file viewer and analyzer
GPS track editor for editing tracks and planning (multiple) day tours
A Matlab software to estimate Euler pole parameters
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
Tool to work on map data, to check the data and generate your own maps
Plugins for OpenCPN
A C library for parsing/normalizing street addresses around the world