SketchUp is a freely downloadable 3D modeling and sketching software by Google (Yah, you heard that right Google!). With SketchUp uou can draw 3D models of houses, decks, space ships or whatever you fancy, color them or use textures and place them in a light source like the Sun and create real-time shadows, without much effort. Once your model is ready it can be placed in Google Earth or printed  out.

The free version works with Microsoft Windows XP and 2000 and requires atleast 128 MB of RAM. A Macintosh version is also in the pipeline.

[Go SketchUp]