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
A Matlab software to estimate Euler pole parameters
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.
Using PHP-CLI to parse NMEA data to generate depth maps with GD
CAD 2D for Land Surveying,Civil and more
a free and open map of wireless communicating objects
GPSBabel converts and transfers data like waypoints, tracks & routes.