JOGRE (pronounced Joe-ger) is the acronym for "Java Online Gaming Real-time Engine".
Multiplayer games programmed so far include Abstrac, Backgammon, Battleship, Camelot, Car Tricks, Checkers, Chess, Chinese Checkers, Connect4, DOTS, Go, Grand Prix Jumping, Hex, Ninety Nine, Octagons, Propinquity, Reversi, Spades, Tetris, Texas Holdem and Tic-tac-toe etc. JOGRE is designed to be an open source equivalent to popular gaming websites such as Yahoo! Games.
It has been used in academic institutions, such as universities as part of the course work.
JOGRE is currently in beta release 0.3.