Heroes of Might and Magic 3

Age of Heroes - http://heroes.h1.ru/
Includes maps and a forum.

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

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

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

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

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

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

Lukman Room for Heroes III - http://www.geocities.com/lukman_VB/Heroes.htm
An editorial on series evolution and map downloads.

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

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

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

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