For those who are not aware DoubleCad XT is a free cad program. I ran across it awhile back, there is definitely a learning curve but it is handy and fun to use. Free!! It can be a little unstable if you do things you aren't suppose to , they are still working the bugs out of it . Also they have a forum which helps with questions/problems you may encounter.

Link for download http://www.doublecad.com/Products/Do...0/Default.aspx

Link for forum http://forums.doublecad.com/index.php