Free site. 3D Warehouse contains millions of models created in [google] SketchUp, one of the most popular 3D modelling apps.
Free site. A huge range of 45,000 free 3D models and no registration required.
Free site. Accurate CAD models from more than 1 million engineers.
Pay site. TurboSquid models are used by game developers, news agencies & more.
Pay site. A very cool portal for either buying or selling 3D models.
