damian penney wrote:
Google bought the folks that write Sketchup, a tool many of us here use
for mocking up our designs and many more would like to if it wasn't so
expensive. Anyway in Google tradition they are offering a free version
of it, you can download it here
http://sketchup.google.com/download.html

SketchUp is a great 3D CAD tool. I use it on everything from furniture
to home design. Easy to learn and easy to use.

R