Master Mind - Javascript verion of game, offered at two skill levels. - http://www.mah-jongg.ch/mastermind/
Super Master Mind - Java-based version includes instructions and play ratings. - http://perso.orange.fr/gcostagl/Games/Smm/lib/Smm.htm
ShopHub.com - A ten chance game using forms. - http://www.shophub.com/codemaster.cfm
Super-Mastermind - Use logic to solve the secret code chosen by the computer in six guesses or less. Game requires JavaScript. - http://www.interjeux.net/jeux/mastermind/index_en.html
Three-Way Artificial Intelligence Mastermind - Online version of the classic board game offering multiple game settings for players of different skill levels. Play against the computer as either Codebreaker or Codemaker. Offers VBScript and JavaScript version. - http://home.pacific.net.hk/~kfzhou/mastermind.html