Open Yahtzee - An open-source, cross-platform, full-featured version of Yahtzee. News, features, and screen shots. - http://openyahtzee.sourceforge.net/
All in One Yahtzee - An advanced version of the classic dice game. Includes variations like original American Yahtzee, Swedish Yahtzee, Maxi Yahtzee (6 dice), Triple Yahtzee (3 columns) and Kismet (colors). - http://www.stefan-pettersson.nu/site/ayahtzee/
DiceDeluxe - Windows shareware game, includes undo, average count, sounds and a saved highscore list. - http://www.stefan-pettersson.nu/site/dicedeluxe/
GameSpot: Ultimate Yahtzee - Reviewed by Trent C. Ward, [6.1/10]. "Yahtzee is Yahtzee, and the addition of a computer screen and mouse doesn't really change that." - http://www.gamespot.com/pc/puzzle/ultimateyahtzee/review.html
Yahtzee - A free downloadable windows version the game. - http://www.rekenwonder.com/yahtzee.htm
YAKzee - Windows shareware version of the game Yacht. Offers information, and downloads. - http://www.yakzee.com/