free, open source (or cheap) CAD / CAM software?

General Questions
#1

Hi,

I’ve got a neat little idea in my head and I would like to start modeling it. This device will probably have a couple of moving parts but nothing too fancy. Probably no more than three interlocking parts acting on each other.

If I can’t simulate the motion, I guess I’ll be happy with just the CAD part.

Any ideas?

Thanks.

ps: for Windows, but if there’s something nice for Linux, I’ll install it.

#2

I’ve used the free version of DoubleCAD before, its pretty decent for a free version, and was compatible with AutoCAD 2009 (if I’m remembering correctly from the last time I used it).

http://www.doublecad.com/

#3

For Linux, try searching on freshmeat.net.

#4

Google SketchUp. I don’t understand why Google keeps making cool software, but doesn’t advertise it.

#5

I’ll second that. I’ve done entire projects using Sketch Up. It doesn’t have the Jedi powers of AutoCAD, but gawd damn it is nice to use.

I believe Google bought Sketch Up.

#6

There are a few (somewhat specialised) offerings here: