GameFAQs: Ultima VI: Walkthrough and message board.
Nuvie: Open source project for the recreation of the Ultima 6 engine running on modern operating systems.
The Ultima VI Project: Remake using the 3D Dungeon Siege engine.
Things Your Mother Never Told You About Ultima 6: Hints, unofficial documentation, add-ons, editing tools, tricks, and screenshots.
Ultima 6 Online: Fan made multiplayer (MMORPG) version, featuring screen shots and a forum.
Ultima VI: The False Prophet: Maps, hints, and music.