Terms of use : It is a long explanation advise visit the term and condition.
File format: .skp
Website: http://sketchup.google.com/3dwarehouse/
Site feature: Trimble 3D warehouse is power by Google, the site bundle with Google forum support, 3D rotate preview, work with SketchUp editing, user can share and upload the 3D model.
To download, user require a Google account.
Screenshots:
