Blender addons to make the bridge between Blender and geographic data
Cross platform (lin/win/mac) geographical information system (GIS)
Visualize deep ocean biogeochemical sediment samples in 2D and 3D!
a simple virtual world editor
Google Earth Enterprise - Open Source
Flights, vessels, satellites and trackers realtime 2D/3D display
LGPL GML parser
XNavigator is a Virtual Earth browser and viewer for http://osm-3d.org