It's that time of year that Squid comes out with his free Cad program picks.
If you've ever thought of designing your dream house, room, or garden/yard these things are priceless and the cool thing is they are free.
Sketchup 6
http://sketchup.google.com/index.html
This one really is easy to use and if you've never played with Cad before get this one first.
It has a great manual and both self paced and Video tutorials.
http://sketchup.google.com/sptutorials.html
Alibre
http://www.alibre.com/xpress/softwar...ign-xpress.asp
This is more complicated but it's also more powerful and has a great tutorial and a forum.
I lucked out when the company first started and I got the full version for free last year.
Good luck with all your designs. (If anyone is interested in pay software I also have a list of some of them I think are pretty cool)