OTB is an open-source C++ library for remote sensing images processing
Some pythons plugins to enhance fantasy maps creation with QGis
Source code for ArcGIS Viewer for Flex - a great application framework
LGPL GML parser
CAD 2D for Land Surveying,Civil and more
Ready-to-use appliance for GIS, Data Mining and Analysis, Modelling...
a free and open map of wireless communicating objects
NAS-KONV delivers XSLT scripts to extract data out of ALKIS NAS files
Geomatics & mapping tools for the masses!