The Ikea planner tools (these pieces of software you've seen in use whenever you've visited an Ikea shop) are now freely downloadable (by now Windows version only).
Although these programs (kitchen, bedroom or office planners) are intended to create custom plans choosing elements from their catalogue of furniture, it is obvious that it may have another use for illustrators and designers.
Sounds good? You have an basic and easy-to-use 3D builder for your comics, illustrations and other drawings and artwork.
- Drag and drop your choice of furniture into the room and fit them to the exact measurements of your own rooms.
- Rearrange and try different styles until you’re satisfied with the result.
- View it in 3-D and print with all the measurements.
Another sophisticated 3D app you can download and use for free is Google Sketchup, a very intuitive program which is capable of building whole buildings and interiors and manipulate them in tridimensional space, invaluable for reference when you draw.
(I saw it on Lifehacker.)