Doomtrooper Official Website: Features card lists, strategy, and information on homemade expansion sets

Harry Potter Trading Card Game: Official site from Wizards of the Coast. Rules, card lists, strategy, fan decks, and current events

Illuminati: New World Order: FAQs, rules, strategy tips, regular news and links to support sites

Monger - V:TES Deck Building Tools: Crypt Monger and Library Monger - searchable databases for deck building

Shadowfist: The official site containing rules, card list, tournament rules, conventions, and art

Wizards of the Coast: Official site with FAQs, card lists, rules, variants, and story lines