Spatial Statistics Libraries & Tools for GeoTools, GeoServer, uDig
Builds Garmin maps from OpenStreetMap
PCRaster environmental modeling software
Workflow and set of tools for Automated Imagery Classification
Geostatistics and geosciences modeling software
The full-featured, easy-to-use desktop GIS with real processing power!
MorphoLim : identifying city boundaries
Source code for ArcGIS Viewer for Flex - a great application framework
Open Street Map (OSM) tools, OSM/XML parser, tag extractor
A frontend for gpsbabel
Interactive OpenGL map projection and navigation with geodetic utils.
Geomatics & mapping tools for the masses!