i dont know any virtual home planner.
The difference is a bit like the difference between an architect's plans for a house and the actual house. A computer scientist might call the plans a virtual house.For more.............Red Deer MLS
Not sure what kind of plans you are making but Google Sketch Up is free. You have to download it. The problem I have had is that it's not as user-friendly as it could be. If you watch the tutorials, it will help. There are ways to actually put dimensions in. You can print out your plans to look like blueprints, sketches, etc. The greatest thing about it is that as you design it, you can walk around in your room, home, backyard, etc. Good luck!
