Where can I find an auto click program for my mouse on Mac OS X?

I have carpal tunnel from typing and clicking my mouse.

I have found many programs that auto click the mouse button in windows but none for Mac OS X.

Does anyone know where I can find a program like this for Mac OS X?

How about the "mouse keys" option in the Universal Access pane of the System Preferences app? There's more info on Apple's page about physical and motor accessibility options for Mac OS X.