Car4Car is a realtime traffic analyzer using OSM map data. It consists of several components such as a j2me mobile client, a java desktop client and a server with a web frontend.
At the moment it uses SUMO traffic simulations for training input but all interfaces are implemented for real world operation. Possible enddevices will be cellphone mobiles, integrated onboard units and navigation systems.

Main features:
- realtime traffic analysis
- visualization of traffic condition over web and xml
- GPSless cellbased localization

See http://car4car.psi.de and Vf Betavine for details.