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
GPS track editor for editing tracks and planning (multiple) day tours
An information system for cyclists in Berlin and Brandenburg
Builds Garmin maps from OpenStreetMap
... the open-source glide computer
Build your own GPS unit
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
utilities for cadastre system
Automated detection of the unknown early map projection
Simple GPS tracking server