A group called the misfits is offering a free steam copy of Chess the Gathering. I'm not sure if there is a regular pc copy. Just register your email and verify and they will send you a key. This game is still in Alpha, so it has a
http://ctg.misfitsattic.com/
or here
http://games.misfits-attic.com/
This game is still in Alpha, so it has a lot work still to be done on it. If you enjoy playing chess grab a copy.