Viking is a free/open source program to manage GPS data
GPS track editor for editing tracks and planning (multiple) day tours
An information system for cyclists in Berlin and Brandenburg
A software package for quantitative analysis in Panbiogeography
Tool for assessment of environmental services on farm scale.
Tool to work on map data, to check the data and generate your own maps
Offline vector map display ported from OsmAnd
Plugins for OpenCPN
A software gps simulator
CAD 2D for Land Surveying and Civil
FastVersion is a Qgis plugin for data versioning in a Postgis database
Multiplatform Ham Radio APRS and Mapping Program