Google SketchUp is a deceptively simple, amazingly powerful tool for creating, viewing, and modifying 3D ideas quickly and easily. Google SketchUp was developed to combine the elegance and spontaneity of pencil sketching with the speed and flexibility of today's digital media.
Requirements:
OS X 10.4.1 or later.
Google Earth
NOTE: If you are running OSX 10.5 (Leopard), please
read this before installing.
Universal Binary