JSokoban is a port of the classic Macintosh puzzle game in which players try to shift the money bags of each level to a given position. The game comes with over 200 levels of varying difficulty, sound, unlimited undos/redos, and support for moving using both the keyboard and mouse.
Java Games is a collection of simple games that are compiled into Java applets and meant to be played online in a Web browser. Currently the collection contains four games: XO World (similar to tic-tac-toe, but with lines of 5 on a 10x10 board); 100 Mack (guess the random combination of 4 images out of a set of six); Memory (flip 2 plates at a time to find matching pairs); and Tetris.
MyMahj is a relaxing solitaire Mahjong game in 2D and 3D. The purpose of the game is to clear the screen of tiles by clicking on two identical tiles (or two seasons or flowers). Only exposed tiles can be removed at any given moment. A tile is exposed if there is no tile over it, and if there is empty space on its left or right side.
Card Monsters lets you play a creatures, instants, and sorceries. You to play the game against a computer-controlled opponent. Currently there are over 300 cards, and you can play in constructed, sealed, and draft mode. The program can automatically download all of the card pictures. The GUI is basic but very usable.