A great site for floorplans for your homes/apartments. Please make it realistic, ie if you have two people, then a two bedroom house/apartment.
Just cut and paste whichever floorplan you need and add it to your own photosharing site, then make a thread in your house/apartment adding said floorplans and we will sticky/lock them so people know what the house/apartment is like
Here is an interactive one, but you have to sign up in order to use it (with your email address). You can design it, then just take a screenshot of it and upload it elsewhere. Unless you pay, you can only design one floorplan at a time, but it gives you more creativity.
Also, for apartment floorplans, check out HERE or HERE -- they sometimes have floorplans of the units available online.