Interactive, thoroughly customizable maps in the browser
Large-scale WebGL-powered geospatial data visualization analysis
A GUI for the freeware Geographical Information System PCRaster
Analysis and display of Census, business, government attribute data
SPatial Analysis With self-organizing Neural Networks
Web Mapping Platform
Multiplatform Ham Radio APRS and Mapping Program
Apl. móvil de Información georeferenciada + visor 3D escritorio
a free and open map of wireless communicating objects
A free library for fast clipping of arbitrary polygons
GPSBabel converts and transfers data like waypoints, tracks & routes.