turps

too sleepy to think about the sexy, but mahjong!

http://home.halden.net/vkp/vkp/freeware.html has a long list of good downloadables, I don't know how many are still good but I've had luck googling for the download file name if it's not available at the original source, and finding it elsewhere.

and this is pretty good too:

http://www.freegames.ws/games/boardgames/mahjong/freemahjong.htm