Unknown_Armies

See also:

Arts: Literature: Authors: E: Eco, Umberto (12)
Arts: Literature: Authors: Horror: B: Barker, Clive (7)
Arts: Literature: Authors: P: Powers, Tim (5)
Arts: Literature: Genres: Fantasy: Authors: G: Gaiman, Neil: Neverwhere (2)
Games: Roleplaying: Genres: Modern and Espionage (46)
Science: Science in Society: Skeptical Inquiry (158)
Science: Social Sciences: Psychology: Psychoanalytic and Psychodynamic: Jungian (60)
Society: Religion and Spirituality: Divination: Cartomancy: Tarot (387)

Atlas Games - Unknown Armies - The official site page. Two short stories, a PDF scenario and character sheet, errata, links.
Spamazon - Page of one artist (Torin Atkinson) frequently found in UA books.
Uarchive - Features archetypes, magic, organizations, and plots by various gamers. Accepts submissions.
Unknown Armies Character Archive - Contains several characters with character sheet and description.