Viking is a free/open source program to manage GPS data
A Matlab software to estimate Euler pole parameters
NMEA 0183 library for Java
Tool to work on map data, to check the data and generate your own maps
Land survey field crew data management for .RAW and .JOB file types.
NMEA libary for java (protocol of GPS devices)
Using PHP-CLI to parse NMEA data to generate depth maps with GD
A gui for linux users of miniHomer, a GPS tracker
Convert a Garmin ADM database file to a GPX file
Visualize data from the opencellid.org project
a free and open map of wireless communicating objects
GPSBabel converts and transfers data like waypoints, tracks & routes.