Cheats and Hints
Diablo Codes, Diablo Hellfire Tomb of Knowledge, Diablo I, Diablo's Lair, DiabloHackPortal, GameFAQs: Diablo, GameWeb - Diablo Cheats, GameWinners.com: Diablo, Jarulfs Guide to Diablo and Hellfire, Lance Necrofear's Diablo World
Clans and Guilds
675 PK Clan, Alex's Page, Avengers of the Dark Realm, Clan (DIE) Leader's Site, Dark Angels of Sin, Dark Lords PK Clan, Dead By Dawn, Demonslayers, Diablo's Hell Angels, Diablos Den
Fan Pages
A Nocturne for Diablo, AV Diablo VA, Concrete Diablo, DarkAngel's Diablo Page, Darkman's Lair, Diablo Game Resources, Diablo Realm, Diablo/Hellfire Multiplayer Autobackup, doa456's Diablo, Happy Cows
Hellfire
GameFAQs, GameSpot, Hellfire - The Dark, Hellfire at DiabloII.net, Level 80, PlanetDiablo: Hellfire, The Adrenaline Vault
Bleeding With Evil
Game information and information on monsters, weapons, armor, spells, potions, quests and shrines. Also provides chat, links and downloads.
Diablo Game Resource Center
Game information, screen shots, quiz, polls, and strategies.
GameSpot's Diablo Information Guide
Information source for monsters, spells, resistances, items, shrines, and quest walkthroughs.
IGN.com
News, game guide, a FAQ and game exploits.