Traccar GPS Tracking System
Accurately Locate Smartphones using Social Engineering
Viking is a free/open source program to manage GPS data
Build your own GPS unit
An interactive tool for GNSS position time series analysis
Minimalistic wide-open GPS-locator/tracker
Tool to work on map data, to check the data and generate your own maps
A C library for parsing/normalizing street addresses around the world
A library to generate short codes
Satellite Emulator
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
See you and your friends on a map
Customization of OpenGTS look and feel
GT2 combines online and offline navigation for hikers and cyclists
FAA digital chart viewer for iPhone and iPad
Visualize data from the opencellid.org project
Plugin for OpenCPN
A program to convert different GPS date formats.
Analyze gpx files and store summary in Sqlite database
Convert GPS-Tracks user-saved tracks to KML files for Google Earth.