Card Game Links

Chron X
This online trading card game has been around since 1997 and allows you to battle either human opponents or a trainer program over the internet with virtual cards representing various agents, weapons, programs, and resources set in a cyberpunk future. Play is free, but you can pay a fee and gain access to more cards and the global ranking system.

Games Hub: Trading Card Games
A directory of Trading Card Games-related websites.

Pagat Games
This game site focuses exclusively on card and tile games from all over the world. Traditional, variants, trading cards... if it's a card game it'll probably be found here. Lots of information and links to other online resources.