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
GPS navigation software for Windows Mobile & WinCE devices.
Viking is a free/open source program to manage GPS data
GWC is a tile server and caching proxy written in Java
GPS track editor for editing tracks and planning (multiple) day tours
Toolkit for working with and mapping geospatial data
Android companion computers for drones & RC vehicles
An information system for cyclists in Berlin and Brandenburg
Open Source Desktop GIS with Surveying and Cartography Functionality
Free software for maps