Geographic library
GPS log file viewer and analyzer
Open source cross-platform Java Visual Traceroute
Viking is a free/open source program to manage GPS data
Toolkit for working with and mapping geospatial data
Bootable linux distro for Geospatial Applications
GWC is a tile server and caching proxy written in Java
Showing The Amateur radio Repeaters Tool
An information system for cyclists in Berlin and Brandenburg
... the open-source glide computer
GPS track editor for editing tracks and planning (multiple) day tours
A Matlab software to estimate Euler pole parameters
Build your own GPS unit
utilities for cadastre system
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
Simple GPS tracking server