GPS log file viewer and analyzer
Viking is a free/open source program to manage GPS data
GPS track editor for editing tracks and planning (multiple) day tours
NMEA 0183 library for Java
Tool to work on map data, to check the data and generate your own maps
Plugins for OpenCPN
GPS mapping and management software
A tile-based map viewer with support for GPX files.
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
Analyze gpx files and store summary in Sqlite database
a free and open map of wireless communicating objects