As of now, I only have two walkthroughs.

The Complete Guidebook by Dan Simpson - A complete walkthrough of how to beat Ultima7

Ultima VII: The Black Gate Walkthrough by the Scourge - Another complete walkthrough that is one of the first Ultima7 walkthroughs made

Forge of Virtue Walkthrough by Kline - A walkthrough for the Forge of Virtue add-on for Ultima7

Note: I, the webmaster of Iolo's Lute, did not write any of these walkthroughs.