Card Games and Solitaire [ http://www.cardgamesolitaire.com/ ]
Offers free solitaire, klondike, freecell, calculation solitaire, pyrimid solitaire, patience and other games playable online or via download.

The House Of Cards [ http://thehouseofcards.com/ ]
Central resource for all information related to playing cards, including rules to card games, links to other card game sites on the web, links to card games of every type, and information on playing cards themselves.