GRASS (All) http://www.osgeo.org/grass
gvSIG (All) http://www.gvsig.gva.es/
uDig (All) http://udig.refractions.net
Quantum GIS (All) http://www.osgeo.org/qgis
OSSIM (Windows & OSX) http://www.osgeo.org/ossim
Other documents: The complete manual in pdf format | License | Readme | Changes