Draft IT

Draft IT is a free CAD software application. It is a powerful and easy-to-use 2D CAD system suitable for all users, in the office or at home.
? Create, print and save your own professional drawings.
? Easy to use - visual aids compliment all commands.
? Powerful drawing tools - lines arcs, circles etc. with dynamic dimensions.
? Dynamic editing functions with visual handles and snaps.
? It is completely FREE.
? A low cost enhanced version is available - Draft IT PLUS.
? Use Draft IT as the basis for your Custom CAD system

http://www.cadlogic.com/products/draftit/index.htm