- GameFAQs: Ultima IV - FAQs, walkthroughs and town script.
- Optima IV - A Virtual Basic clone of Ultima III and IV. With game design information, screenshots and download. Source and additional modules are available.
- Ultima IV Solution - Bare-bones walkthrough including all essential steps and items, by Stephen Lee.
- Ultima IV Website, by Samson Dragon - Provides walkthroughs, maps, and utilities.
- Ultima IV: Gaining Virtue - List of actions that alter your virtue in the game.
- Ultima IV: Quest of the Avatar - Origin's official site. World and dungeon maps, walkthough, documentation, and music files.
- Ultima IV: The Dawn of Virtue - A fan remake project with 3D rendered isometric graphics.
- Ultima Personality Test - Virtue based class-determination questions, game crib sheet, and character files.
- xu4 - Ultima IV Recreated - A remake of the classic computer game Ultima IV for modern operating systems.