Geographic library
GPS log file viewer and analyzer
Open source cross-platform Java Visual Traceroute
Toolkit for working with and mapping geospatial data
Viking is a free/open source program to manage GPS data
Bootable linux distro for Geospatial Applications
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
Set of Java interfaces for geospatial applications
Open source system for GPS tracking devices
utilities for cadastre system
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig