Viking is a free/open source program to manage GPS data
... the open-source glide computer
Plugins for OpenCPN
CAD 2D for Land Surveying and Civil
Analyze and change GPS coordinates and time in digital pictures
Satellite Emulator
CAD 2D for Land Surveying,Civil and more
Plugin for OpenCPN
a free and open map of wireless communicating objects
GPS data in a file for development testing
PC/PocketPC tool to get tracklogs from the WBT-201 GPS logger
GPSBabel converts and transfers data like waypoints, tracks & routes.