Q-Rap (www.QRap.org.za) is a Radio Network Planning plug-in for QGIS
The full-featured, easy-to-use desktop GIS with real processing power!
Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
PCRaster environmental modeling software
A GUI for the freeware Geographical Information System PCRaster
Tool to work on map data, to check the data and generate your own maps
Multiscale Curvature Classification for LIDAR Data