Liam Routt: Nephilim: House rules and a frequently-asked questions list for the Nephilim mailing list.
Nephilim Mailing List Archive: Selected messages, articles, and links.
Nephilim: Occult Roleplaying: Features a Nephilim/Call of Cthulhu crossover campaign.
Nephilim; Troy and camelot: Rules and background for campaigns set in the British Isles.
Shelby Babb's Nephilim Page: House rules.