News From The Occult Underground:Collaborative resource page with new NPCs, avatars, rituals, artifacts, rumors and scenarios. Official site maintained by John Tynes.
The Unknown Armies Novel Project:The first Unknown Armies novel, being done as a collaborative effort between the game's creators, industry professionals who have written for the system, and players from the UA mailing list.
Atlas Games - Unknown Armies: The official site page. Two short stories, a PDF scenario and character sheet, errata, links.
Demonground: Electronic fanzine for modern horror roleplaying. Free downloads in zipped PDF format. Includes UA as well as other systems.
Spamazon: Page of one artist (Torin Atkinson) frequently found in UA books.
UA -- The Unknown Armies Mailing List: This is the home page, including archives and other information, for the UA mailing list. Aside from Atlas Games, the list is the source for most UA material.
Uarchive: Features archetypes, magic, organizations, and plots by various gamers. Accepts submissions.
Unknown Armies Character Archive: Contains several characters with character sheet and description.