A collection of 3D models browsable online. There you find thousands of models on any topic, view it in 3D, and download it.
Sketchup Google 3D Warehouse: http://sketchup.google.com/3dwarehouse/


Create your own models with Google SketchUp 7
Create 3D models and share them with the world
Google SketchUp is software that you can use to create 3D models of anything you like.
http://sketchup.google.com/