DCFutures: Hellblazer
Several fan fiction stories about John Constantine.
Hellblazer Home Page
A Hellblazer discussion board, fan fiction, and an incomplete index of John Constantine appearances.
John Constantine's Friends and Family
Brief text descriptions; current through issue #8.
Ravenscar's Hellblazer Page
Quotes from the comic and an index of magic John Constantine has performed.
Sailor Hellblazer
A Sailor Moon/John Constantine crossover fan fiction.
Straight To Hell : A HellBlazer Site
Information on John Constatine: Hellblazer, with focus on the characters and the stories. Also, a small gallery and some interviews.
Tabula Rasa: Hellblazer Interviews
Interviews with Jamie Delano and Garth Ennis about their time on Hellblazer, and other work as well.
The Ultimate Hellblazer Index
An index of appearances by the Vertigo character, John Constantine, and his relatives and alternates selves, both in his own title, Hellblazer and in other comics.