Embed Mahjong is a free online mahjong game that you can get from embed.com, and embed for free on your web site or blog. Mahjong is a popular tile based solitaire matching game based on the Chinese Mahjongg tile games that are played in a similar fashion to the western card game Rummy.
Melee Games has a collection of free online games from embed, and is using them to demonstrate the ease with which any domain owner can put up their own web site content, with embed content.