Elliquiy has a dicebot, but there's plenty of online dice generators out there, more than a few of which are specifically made for games like this.  I think just typing in D&D dice generator will get you one right off the bat.<br/><br/>http://www.d20srd.org/extras/d20dicebag/ (http://www.d20srd.org/extras/d20dicebag/)