Free Interior Design Software is a great site for all the info and reviews on all interior design softwares.  It will go in depth on what they can do and which ones would work the best for your own personal situation.

If you want to learn about anything from interior design, to free softwares, kitchen design softwares, and even these fun interior design game programs that are out there.  It makes designing the interior of your house fun, this site is a must see.