I wouldn't have come across homestyler.com had I not walked in my sister's room to see her working on a Floor Plan. It is very interesting. I had so much fun making a design of my grandpa's house. Check it out. Scroll down and click on "explore". Don't forget to see the 3d version of it on the top right link.
The link that will take U straight to the design.
http://www.homestyler.com/designerro/32567565-05cb-4dc0-aba1-c6da119ac07a