Viking is a free/open source program to manage GPS data
... the open-source glide computer
A Guide of the Trees of Barcelona City
A Matlab software to estimate Euler pole parameters
Tool to work on map data, to check the data and generate your own maps
A gui for linux users of miniHomer, a GPS tracker
a free and open map of wireless communicating objects
Convert GPS-Tracks user-saved tracks to KML files for Google Earth.
GPSBabel converts and transfers data like waypoints, tracks & routes.