Hi,
I was wondering if anybody knows of a program out there (hopefully free) that lets you design gear trains? If not gear trains, then just the gears themselves (specifying tooth count, etc). I'm sure all the CAD programs let you do this. Does anyone recommend any good ones? I've read that there aren't so many choices for OS X.
Any advice? (I'm looking to build a clock if anyone knows of a clock-specific program

)
gabe