Google SketchUp Pro

Google SketchUp Pro is an easy-to-learn 3D-modeling program designed for architects, civil engineers, filmmakers, game developers, and related professions. It includes tools to create 3D models of just about anything and you can add details, textures, and glass to models, and design with dimensional accuracy.

Finished models can be placed in Google Earth, and users can also share them with others by posting them to the 3D Warehouse.