Viking is a free/open source program to manage GPS data
Toolkit for working with and mapping geospatial data
An information system for cyclists in Berlin and Brandenburg
Open source system for GPS tracking devices
NMEA 0183 library for Java
A GUI for the freeware Geographical Information System PCRaster
Library for OpenStreetMap offline rendering and routing
Multiplatform Ham Radio APRS and Mapping Program
A tile-based map viewer with support for GPX files.
Former project page
Some pythons plugins to enhance fantasy maps creation with QGis
Geolocation Postcode Algorithm
Apl. móvil de Información georeferenciada + visor 3D escritorio
CAD 2D for Land Surveying,Civil and more
a free and open map of wireless communicating objects