Yahtzee

Diceridoo
Online dice game that tracks high scores.
http://www.pimpernel.com/diceridoo/

Five-O
Yahtzee type dice game written in Java.
http://www.fwend.com/five0.htm

Free Online Yahtzee Game
Solo or multi player games available. Registration is required.
http://www.free-online-yahtzee-game.com

Gord's Yahtzee
A java version of Yahtzee that works well.
http://home.teleport.com/~gord/java/yahtzee/

Jahtzee / Webdice
Online dice game that tracks and compares high scores with other players from around the world.
http://www.webdice.org

Java Yahtzee
Java Yahtzee game plus source code by Dan Seidman.
http://www.bodo.com/Applets/Yahtzee/

JavaScript Yahtzee
Yahtzee dice game using client-side JavaScript.
http://www.alchemica.co.uk/games/yahtzee/

Maxi Yahtzee
Maxi Yahtzee is a very good 6 dice version of Yahtzee. Features include highscore list and 3D dice.
http://www.maxiyahtzee.com

Maxi Yahtzee
Yahtzee and many other free online games and casino games.
http://www.gamesandcasino.com/MaxYPE/

NotZee!
It's Not Yahtzee. It's NotZee! Choose the type of game you would like to play. Classic, Pyramid or Diamond.
http://harringbros.com/notzee/

Paine's Yahtzee
A nice javascript version of Yahtzee.
http://www.keithpaine.co.uk/yahtzee/yahtzee.htm

Rekenwonder
Javascript version of the popular dice game
http://www.rekenwonder.com/yahtzee/yahtzee.htm

Roll 'Em!
An online Yahtzee-style game written in Javascript featuring the Catherine Wheel.
http://www.notalot.com/cwville/roll-em.htm

Tornado Yahtzee
An excellent two player flash version of Yahtzee.
http://www.tornadogames.com/playgame.phtml?id=32

Triple Quintzee
Java implementation of a Triple Yahtzee variant.
http://scv.bu.edu/~aarondf/java/quintzee.html

Yahtzee in Flash by EyeGrid
EyeGrid webservices has some fun games for you.
http://www.eyegrid.com/yahtzee/yahtzee.htm

Yahtzee In Java Online
Java Yahtzee game with several variations and high score lists.
http://www.wartoft.nu/yahtzee/

Yahtzee Online with High Scores
Well made Java version of Yahtzee
http://jamesgart.com/yahtzeeonline/yahtzee.html

Yahtzree
Variant of the classic game of yahtzee that is written in Java
http://www.eeaston.com/YahtzREE/

Yatzy
A Javascript Yahtzee game with animated dice and sound.
http://www.famholen.com/yatzy/