Today's tool isn't actually a papercrafting tool, but is one I've found useful as I've been trying to organize my craft room.  It is freeware software from SweetHome3D.  It allows you to lay out a room and see it in 3D - and even to make a video of it!  The above is a video of one of the options I'm considering for my craft room.  As you can see, I've stacked things on top of each other and can get an idea of how they will look.  The pictures don't always look like the item I'll be putting there -- I simply used the items they had and sized them to fit my needs.  For instance, the curtain rod in the picture, will actually be a ribbon holder that will be mounted to the wall. However, it's been a BIG help in trying to figure out what I can do for the least amount of money -- and my husband is no doubt grateful that he didn't have to actually move the furniture around the room as many times as I did in the virtual world before finding something that I thought would work! :D

I found the software to be relatively easy to use. You can save files in PDF format that show all the dimensions of your items, the basic room layout, and a 3-D picture of it, and of course you can print stuff.  Not bad for a freebie program!