Viking is a free/open source program to manage GPS data
Plugins for OpenCPN
Analysis and display of Census, business, government attribute data
Geostatistics and geosciences modeling software
Multiagent simulator of road traffic in Qt/C++ and OpenStreetMap.
OTB is an open-source C++ library for remote sensing images processing
Open Street Map (OSM) tools, OSM/XML parser, tag extractor
Multiscale Curvature Classification for LIDAR Data