Heroes of Might and Magic 3

Aliz's Pages
A couple of medium-sized maps.
http://www.geocities.com/alizspages/heroes

The Brotherhood of the Foot
Includes strategies, chat, cheats, and a mapmaking page.
http://www.angelfire.com/wy/theBrotherhood/

Dungeons Keeper - HoMM database
Information about the game, hundreds of maps, map packs and campaigns, gaming tips, message board and polls.
http://homm3.strategy-gaming.com

GameSpot's HOMM III Gameguide
Strategies and walk-throughs.
http://www.gamespot.com/features/heroesiii_gg/index.html

Heroes 3 Tournament of Honor
Player list with pictures and profiles, hall of fame, and maps.
http://www.toheroes.com/

Heroes of Might and Magic 3 Armageddon's Blade Strategy Page
News, cheats and strategies.
http://www.geocities.com/ivocom_creations/Index.html

Kippies great HommIII page
Strategy, cheats and maps.
http://www.angelfire.com/ak3/hommIII/Index.htm

Loki: Heroes III
Linux port of Heroes III. Offers game information, reviews, screenshots, and demo.
http://www.lokigames.com/products/heroes3/

Neoseeker
Presents cheats and links to reviews.
http://www.neoseeker.com/Games/Products/PC/heroes_of_mm_3/

The Strategist's Corner
Includes a newbie guide, strategies, scenarios, and game information.
http://members.tripod.com/~kristo605/heroes3/

Tolkien Scenarios
Scenarios based on the world of Tolkien.
http://www.lysator.liu.se/tolkien-games/entry/homam3.html