Have a look at [OSM2WORLD][1]
[OSM2WORLD][1] or [OpenScienceMap][2] to name but a few from the collection at [3D][3] in the OSM wiki.
[1]: http://wiki.openstreetmap.org/wiki/OSM2Worldhttp://wiki.openstreetmap.org/wiki/OSM2World
[2]: http://wiki.openstreetmap.org/wiki/OpenScienceMap
[3]: http://wiki.openstreetmap.org/wiki/3D