» Dolphin Dice    A Yahtzee game for Windows that features high scores comparisons with others from around the world.    http://www.johannorberg.se/dolphin/

» Knuffel    Windows game based on 'Yahtzee' with a mailing list, chat page, and high scores list.    http://www.plenio.com/knuffel/

» Yahtzee Master    For Windows and Linux, features multiplayer, a computer player and high scores.    http://jamesgart.com/yahtzeeonline/index.html