- Berkley Cthulhu Archive - A collection (somewhat dated) of mailing list archives, character sheet templates, character generators, pictures and other miscellaneous items. Most of the material dates from 1993-1996.
- Byakhee - Windows WYSIWYG computer program, investigator generator for any era and Delta Green, prints telegrams. Free, download source code.
- Call of Cthulhu Adventures Online - 3 by Michael C. LaBossiere: My Aunt's House, Drooler in the Dark, The Knife.
- CoC CharGen - OpenSource character generator written in Java. Released under the GNU GPL.
- Cthulhu Coffee - A slightly humorous website that has information about the Cthulhu Mythos and various convention parties the owners throw.
- CTHULHU International - CTHULHU International provides support to Call of Cthulhu RPG and its Pagan Publishing Supplements; Delta Green, players and Keepers and to promote the writings of H.P. Lovecraft.
- Fallen Future: Cyberthulhu Gaming - A cyberpunk-genre rules expansion and adventure for the Call of Cthulhu RPG.
- Javascript Cthulhu d20 Character Generator - A rather hefty client-side script which can take a while to load on Internet Explorer.
- Mook's Mythos Madness - Call of Cthulhu, Cthulhu Live, Lovecraft and Cthulhu Mythos art and props site. Prop making techniques and larping discussions
- Propping up the Mythos - A guide to making objects from the stories of H.P. Lovecraft. Resource for making props for Call of Cthulhu or Cthulhu Live games.
- Scooby Doo Cthulhu - Will the horror never cease. Statistics for the 5 cartoon characters in CoC format.
- Shoggoth.net: - An interactive weblog, forum, and article archive for the Mythos and Call of Cthulhu RPG Community. Current and updated often.
- Tales of Terror - A collection of grisly ideas for use in Call of Cthulhu and other games. Each Tale is a short horror scenario description, "stripped clean of rotting statistics and wretched prose", a paragraph or so, with three alternate Possibilities for developing the events behind the mystery.
- The Mana Bros Call of Cthulhu Pages - Resources, including the regularly updated "Turin (Italy)Guidebook" for 1920s, short Lovecraft bio and Italian Publishing History, Book of Characters: professions and generation rules (MSWord Zip); Niteside Dreams, alternate setting for Call of Cthulhu games using Film Noir conventions in a magic-rich world subtly corrupted by the Mythos.
- Unseen Masters - Official site for the "Unseen Masters" adventure supplement for Chaosium's Call of Cthulhu Role Playing Game.
- Vampulhu! - Conversion rules and design outline for a Vampire: the Masquerade / Call of Cthulhu hybrid RPG under White Wolf rules.
- Yog-Sothoth.com - Also known as 'CthulhuFan.com', this web site is dedicated to Chaosium's game, 'Call of Cthulhu'. Roleplaying in the worlds of H.P. Lovecraft.
- Delta Green (11)
