Envisioneer Express is the easiest to use residential design program available. Specifically designed to introduce clients to the simple creation of floor plans, 3D models, and interior design concepts. Envisioneer Express uses real world objects such as walls, doors, windows and stairs to make creative designs fast and easy.
Found this link for Bryce 3d Software, I've been using it for more than 4 years now. Cool easy to use and Creat 3D landscape modeling, animation, and rendering software.imort export to many 3d known formats.
The image above is my own, done it in less than 5 minutes !!