Yahtzee
Diceridoo, Five-O, Flash Yahtzee, Gord's Yahtzee, Jahtzee / Webdice, Java Yahtzee, JavaScript Yahtzee, Javascript Yahtzee by xDev Design Interactive, Maxi Yahtzee, NotZee!
Dicemania
Online multi-player dice game. Includes a user guide, rules, message board, high scores, and list of resources.
Farklepimp
Roll six dice and try to collect fives, triples, or a full straight. Played in twelve rounds for points. Requires email address registration to play.