Geodesy based library (geodetic and geocentric functions)
Open Source Desktop GIS with Surveying and Cartography Functionality
a free and open map of wireless communicating objects
Tool to work on map data, to check the data and generate your own maps
Track your mobile device or cellphone via internet using OpenGTS/GPRMC
Subway maps of the World !
XNavigator is a Virtual Earth browser and viewer for http://osm-3d.org