Kajongg is the ancient Chinese board game for 4 players. Kajongg can be used in two different ways: Scoring a manual game where you play as always and use Kajongg for the computation of scores and for bookkeeping. Or you can use Kajongg to play against any combination of other human players or computer players. If you are looking for Mah Jongg solitaire, use the kmahjongg package.
WWW: http://www.kde.org/applications/games/kajongg/