Cross platform (lin/win/mac) geographical information system (GIS)
Blender addons to make the bridge between Blender and geographic data
Interactive, thoroughly customizable maps in the browser
Toolkit for working with and mapping geospatial data
GPS track editor for editing tracks and planning (multiple) day tours
FastVersion is a Qgis plugin for data versioning in a Postgis database
Java Swing component for integrating OSM maps into your Java app.
Toolbox for geoscientists and geo enthusiasts
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
Source code for ArcGIS Viewer for Flex - a great application framework
Customization of OpenGTS look and feel