American Cribbage Congress (ACC) - http://www.cribbage.org/
The largest cribbage organization in the world. Sanctions tournaments, and authorizes grass roots clubs (237) throughout North America.
Card Games - http://gamerules.org/
Premium website for most common card games.
Tripoley Rules - http://www.tripoleyrules.com/
The site dedicated to the game of Tripoley, the game that combines three all time great games in Michigan Rummy, Poker and Hearts.