Noodean The Best free game site i have ever seen. Easy download, many games. Every game is checked so no useless crap.

Alex Soft  Lots of realy free games. But there is automate submition so it seems that they do not check each game, so you can can download some garbage, but all games i have downloaded from them is ok.

Free Games ZoneRealy free games. No disturbing adds and other unnecessary information.

Reflexive Arcade Few good card games

BlueDojo Few but very professional card games

The House of Cards  There you can find anything about cards, but in most cases you have to pay, although with some efort you can find some demo versions.

Download free games  Goot looking easy to navigate site, mostly shareware games, but many demo versions.