Google SketchUp is a free, easy-to-learn 3D-modeling program with a few simple tools to let you create 3D models of houses, sheds, decks, home additions, woodworking projects, and even space ships. You can add details, textures, and glass to your models, and design with dimensional accuracy. You can place your finished models in Google Earth, share them with others by posting them to the 3D Warehouse, or print hard copies.
Download Google distributed a 3D design and modeling software application which with the help of the famous company managed to make itself a name in the industry. Now SketchUp, as the program is known, is owned by Trimble, another company dedicated to these purposes, that will take care of distributing and carry on meeting the needs of 3D design professionals.
SketchUp Tutorial - 1 - Beginner SketchUp Tutorial