“Google SketchUp (free) is an easy-to-learn 3D modeling program whose few simple tools enable you to create 3D models of houses, sheds, decks, home additions, woodworking projects ? even space ships. You can add details, textures and glass to your models, design with dimensional accuracy, and place your finished models in Google Earth, share them with others by posting them to the 3D Warehouse, or print hard copies. Google SketchUp (free) is a great way to discover if 3D modeling is right for you.” – google
I made a house (outside only) in about 5 minutes. Pretty easy to use, but one thing didn’t seem to work.