Viking is a free/open source program to manage GPS data
An interactive tool for GNSS position time series analysis
Plugins for OpenCPN
A C library for parsing/normalizing street addresses around the world
Combines the high accuracy of AR with the scale of GPS data
This is a port of LibRTK on C#, and into a small c/c++ library.
Analyze and change GPS coordinates and time in digital pictures
Application to browse and visualize your GPS files
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
Using PHP-CLI to parse NMEA data to generate depth maps with GD
GPS data in a file for development testing