ZC Dice generates random dice rolls for use with pen-and-paper RPGs and other tabletop games. It can also be used for anything that requires random numbers.
Mac OS X character generator and dice roller
A desktop D20 dice roller written in Java
A general-purpose dice rolling application with programmable buttons and extensive customization
Free and open source virtual dice roller
Allows you to play iDice on your Mac.
Free RPG dice roller for your Mac
Simple add-on for WoW that acts like the masterlooters assistant