I don't know of any free ones but Auto Desk (makers of AutoCAD) have a very good and inexpensive (under $80.00)program called Quick CAD. There are other home design software programs out there for under $80.00 but I can't vouch for them having not used them. Quick CAD does everything you might need and even reads AutoCAD 2000 format files. It sure beats the $4000.00 bucks for the full on AutoCAD 2000 software!
