YAKzee  
   Windows shareware version of the game Yacht. Offers information, and downloads.
   http://www.yakzee.com/

Yahtzee for Windows  
   A free downloadable version of the game.
   http://www.yahtzee.org/

Yahtzee  
   A free downloadable windows version the game.
   http://www.rekenwonder.com/yahtzee.htm

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

DiceDeluxe  
   Windows shareware game, includes undo, average count, sounds and a saved highscore list.
   http://www.stefan-pettersson.nu/site/dicedeluxe/

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/