Mouse Clicker for Mac

Ok...Windows has Mouse Tractor- Home for making your left button on your mouse click as fast and as many times as you'd like...so when you're playing a game on Facebook such as Farmtown/Farmville/Island Paradise..you don't have to click 1,000 times while harvesting and hurt your finger/wrist......I have been searching for a decent mouse clicker for Mac for a long time, but haven't found anything yet. There are some programs that you can record your mouse click...but that doesn't work out when you're trying to play a game...does anyone know a good mouse program...or maybe I can build one easily using a tool or something? Any help would be appreciated.