CAD, BIM & 3D

If you have interest in using a professional game engine freely, at least in a non-commercial context, you can try the Unreal Development Kit . This is the Unreal 3 Engine and the kit is complete with the runtime engine and the editors required to make levels and interaction. PC-only and ensure you have a decent graphics adapter with support for shaders.

If you are a member of the Educational community from Autodesk at http://students.autodesk.com than you can get free access to the (virtual) presentations from Autodesk University in Las Vegas. By pure chance I already got an entrance pass from the CGArchitect mailing list. Now I feel a bit spoiled. Maybe I can transfer it?