Rolz - Free dice-rolling tools for role-playing games.
Yahtzee Master - The Game of Yahtzee online or offline.
Open Yahtzee - A cross-platform Yahtzee game.
Yachty - Classic dice game played solo offline or online.
Dice with Buddies - Play against family and friends anytime, anywhere.
RANDOM.ORG - RANDOM.ORG offers true random numbers to anyone on the Internet.