Cross platform (lin/win/mac) geographical information system (GIS)
Blender addons to make the bridge between Blender and geographic data
GeoServer repository
An open source geocoder for openstreetmap data
Interactive, thoroughly customizable maps in the browser
Large-scale WebGL-powered geospatial data visualization analysis
Geographic library
Viking is a free/open source program to manage GPS data
GWC is a tile server and caching proxy written in Java
Toolkit for working with and mapping geospatial 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
Open Source Desktop GIS with Surveying and Cartography Functionality