MKGI Chess Club
MKGI Chess Club is a chess playing server with a pure Web interface. It features complete player profile management, full html email notification with embedded board display. It also features an interface to match against chess engines such as gnuchess, phalanx, and crafty.
Online Chess Club
Online Chess Club (OCC) is a PHP chess game. It allows you to play any number of games simultaneously against your friends online using only a Web browser, provided you own some PHP-ready Web space.
PCChess lets you to enrich a Web site powered by Joomla 1.5 with a component for playing a chess game by mail.
TryChess is a multiplayer online chess game with many features. First it was only a test to try PHP5's news features. But it started growing and became a nearly complete chess game with many features.
WCG is a Web-based chess game written in PHP. Text files are used for storing data and the installation is very easy.
webDiplomacy (previously phpDiplomacy) is a popular board game in which you battle to control Europe, but this isn't a game of luck; to win you must be diplomatic and strategic, forming and breaking alliances and bargains. phpDiplomacy takes the fight for Europe to the internet.