Blackshadow Dragon's Ultima Warehouse used to host several Ultima resources that could be found elsewhere on the net (and some which were slowly vanishing from the net); this includes maps, downloads, music, walkthroughs and more.
Formerly known as "The Codex of Editable Wisdom", this site is the latest of a long line of attempts at creating an Ultima encyclopaedia. Using wiki technology, this site has certainly reached this objective.
Arthuris Dragon's Ultima Maps and Tables incorporates some miscellaneous resources, mostly consisting of maps. The maps here are unique, and the most precious to me are the complete Ultima Underworld (1 and 2) maps and the huge computer-generated maps of Ultima 7 (parts 1 and 2).
At Arthuris Dragon's personal page are hosted the IRC logs of most of the Ultima engines.
Iolo's Lute specialises mostly on Ultima 7 (parts 1 and 2) but also has a section dedicated to Ultimas 1-6. The information for Ultimas 1-6 seems to be taken from other sources (especially the Ultima Web Archive) but the Ultima 7 parts are really detailed and apparently original. Even sidequests are well explained.
Ultima Thule! provides lists of information about the Ultima series including price lists, ethics and characters, as well as some downloads of Ultima characters for the Infinity Engine RPGs.
When using the Wayback Machine, you might not be able to access the homepage. Instead, try accessing the Ultima 5 Manual and Maps (Wayback Machine link) directly.
The Ultima Web Archive is the official Ultima information archive - one of the oldest resource sites, and has not been updated in years, but can still be useful. The FTP archive contains other stuff that doesn't appear on the actual website.
This site was once a great archive of patches such as the Ultima 9 dialogue, economy and monster patches (even made by maintainers of Fans for Ultima itself), and linked to remakes much like Ultima: The Reconstruction and Ultima: Aiera nowadays do. Eventually, it became out of date, and its maintainers saw no point in letting it stand any more.
Hannibal's Ultima IX Page was one of the best sources of Ultima 9 information, humour and pictures. The site was eventually taken down due to hosting issues, but Hannibal was kind enough to send me the files and give me permission to host them, on 24th September 2005.
Ultima Info is one of the greatest Ultima resource sites on the net, originally maintained by one of the most knowledgable dragons. There are many parts to Ultima Info, including a maps section, an archive of Micro Dragon's once-lost documentation and other useful sections. But the most prominent is The Other Codex, containing general information about all the Ultimas. Much useful information is provided by Paulon himself, and he also links to external resources.
La Legende d' Ultima is a French information site which used to host various Ultima resources from Ultima sources, although Sergorn himself translated several pieces of written information to French. As from August 2005 an English version of the site, called "The Ultima Legend", became available. In more recent years, the site became what it is now - a French-only shadow of its former glory, with the news/blog being the main attraction.
PD's Hint Network has complete guides to Ultima 1 and Ultima 8, and an incomplete but well-detailed guide to Ultima 9. The Ultima 8 guide in particular is extremely detailed and goes into all areas on the game; it is one of the most detailed guides on the net.
