CS-Map
FDO
Fusion
GDAL
GeoNetwork
GeoPrisma
Geoinformatica
GEOS
GeoTIFF
Generic Geometry Library
GRASS GIS
Mapbender
MapGuide
MapServer
MetaCRS
OSGeo General and SAC
OSGeo Live
OSGeo4W
OSSIM
PostGIS
Proj4js
Proj4J
Ubuntu GIS
Enterprise Linux GIS
.