GNUSTEP Live CD contains a lot of software for GNUstep, a free implementation of the OPENSTEP framework (which is also directly used in Mac OS X as Cocoa). It includes excellent applications for RAD (GORM and ProjectCenter). The CD is available for i486, AMD64, Apple Mac PowerPC, and Sun UltraSPARC computers.
MAHC is a complex PHP system that installs easily and allows people to chat using only HTML. Features include multiple rooms, private chat, user colored chat text, games (checkers, chess, hangman, tictactoe, dicezee, crossword), private chat, a "weak" AI chat, Inter-chat messaging, selectable MIDI music, and 3D graphical smilies. The Web server requirements are currently only PHP4 and a crontab facility. The current version is stable, but lacks in documentation.
MoxQuizz is a multilingual IRC quiz/trivia script for eggdrops which acts as a game master. A question is posted to the channel, and all chatter is searched for the answer. If something matches an answer or an optional regular expression, the user who said it receives a point. Highscores and an allstars table are managed. Users can ask their own questions, too. A large set of German and English questions are provided, but you can easily run MoxQuizz with your own set. There are numerous fun commands like !hug, !roll, and others.