Ultima IV: Quest of the Avatar Origin's official site. World and dungeon maps, walkthough, documentation, and music files. http://www.uo.com/archive/ultima4/

Ultima Personality Test Virtue based class-determination questions, game crib sheet, and character files. http://www.tk421.net/ultima/

Optima IV A Virtual Basic clone of Ultima III and IV. With game design information, screenshots and download. Source and additional modules are available. http://www.wizardportal.com/optimaiv/

Ultima IV: The Dawn of Virtue A fan remake project with 3D rendered isometric graphics. http://www.hut.fi/~jtpelto2/ultima4/

GameFAQs: Ultima IV FAQs, walkthroughs and town script. http://www.gamefaqs.com/computer/doswin/game/11099.html

Ultima IV Website, by Samson Dragon Provides walkthroughs, maps, and utilities. http://www.fortunecity.com/rivendell/dark/169/

Ultima IV Solution Bare-bones walkthrough including all essential steps and items, by Stephen Lee. http://members.aol.com/UltimaFile/files/u4.txt

xu4 - Ultima IV Recreated A remake of the classic computer game Ultima IV for modern operating systems. http://xu4.sourceforge.net/

Ultima IV: Gaining Virtue List of actions that alter your virtue in the game. http://martin.brenner.de/ultima/virtuechanges.html

Ultima 3: Exodus Shrine Detailed guides and walkthrough. http://www.rpgclassics.com/shrines/nes/ultima3/