Viking is a free/open source program to manage GPS data
Automated detection of the unknown early map projection
GPS navigation software for Windows Mobile & WinCE devices.
GPS track editor for editing tracks and planning (multiple) day tours
A software package for quantitative analysis in Panbiogeography
Geographic feature extraction and data mining
Tool to work on map data, to check the data and generate your own maps
PCRaster environmental modeling software
Plugins for OpenCPN
Geostatistics and geosciences modeling software
A software gps simulator
a space-time interpolation geostatistical tool
A Landsat 8 scene viewer
GeoData Web Editing [core SIG Web]