A PHP Web Application that you can install on your own web server. It allows you to play chess with other users across the internet or sitting at the same screen. It only permits valid moves and can automatically detect check and checkmate status.
Javascript platform for tile map based single/multiplayer games with both off-line and server-based play modes. Try it out right away at http://tilescape.hg.sf.net/hgweb/tilescape/raw-file/tip/js/game.html