Commercial Model Designers (not free)

DigiGraph Technical DXF 3DS DGN OBJ RAW TSB WRL Appliances . Electronics . Furniture . Fixtures .Tools . Toys . Structures . Vehicles

Falling Pixel 3D Models - online resource for professional high quality 3d models and textures.

Flat Pyramid is 3D marketplace were digital artists can get ready-made 3D content, for free download and also for purchase. Digital artists/studios can also license their 3D content and earn significant revenue.

Model Master’s DXFAirplanes . Automobiles . Architecture . Chairs . Character . Desk . Exercise . Heavy Equip Helicopters . Military . Sports . Shelving . Trains . Trucks

Shadow Gap Architectural Visualization creates stunning, photo-realistic architectural visualisations. Based in Melbourne, Australia.

Ted Kyte 3D models, some free textures.

Turbo Squid -  Categories include people, animals, vehicles, poses, props, clothes, hair, furniture, sci-fi, scenes, textures and scripts.

Zygote Including Poser Models Anatomy . Animals . Characters . Cloths . Furniture . Humans . Sport . Tools .

3D02 a few free models for download (maybe)

3D Export You can buy high quality model or start to sell own models and to earn money! is a provider of photo references for each 3D/2D artists, hobby artist or freelancers as well as the game developers and graphic studios

3d Virtual Tour - Global 3D Arts has been working in this way with architects and developers for over 20 years.