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
NMEA 0183 library for Java
Tool to work on map data, to check the data and generate your own maps
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.