Hellnotes
The insiders guide to the horror field. Weekly newsletter with author profiles, book reviews, and market reports. Published by horror writers.
http://www.hellnotes.com

SFF: Online Writing Workshop
Web-based, peer-review writing workshop for aspiring horror authors. Includes reviews, discussion list, and newsletter.
http://sff.onlinewritingworkshop.com/

Ravenlike
Horror writer's weblog with news about publishing trends, interviews with authors, a few notes about horror writing, and copyright issues.
http://www.bloodletters.com/ravenlike.shtml

Horror World
Resources for horror readers and writers. Markets and convention listings.
http://www.horrorworld.org/

Cafe Doom
Forum for horror and gothic writers. Includes contests and fiction postings.
http://www.cafedoom.com/forum/

Horror Writers Association
A worldwide organization of writers and publishing professionals dedicated to promoting dark literature and the interests of those who write it.
http://www.horror.org/

Dark Echo Horror
Horror writers workshop, links, reviews, and newsletter.
http://www.darkecho.com/

Dark Markets.com
Online market guide for horror writers. Forum and newsletter.
http://www.darkmarkets.com/

Persephone Writers Organization
To promote the professional education and advancement of women writers of the dark literary arts.
http://persephonewriters.org/

Yahoo Groups: Writing Horror
This is a group that explores all facets of the horror genre. Ideas such as horror, romance, supernatural, and erotic horror. Email list for horror writers.
http://groups.yahoo.com/group/writing_horror/

HorrorMasters Writer's Page
Directory of resources and markets for horror writers.
http://www.horrormasters.com/W-links.htm

Bloodletters: Goblin Markets
A searchable index of paying markets to sell your horror fiction.
http://bloodletters.com/goblin/

MSN: Horror Writers Workshop
For those interested in macabre, suspenseful fiction. Writer's forum.
http://groups.msn.com/HorrorWritersWorkshop

The Horror Writers Association of Australia
A community for writers of horror in Australia.
http://www.darkanimus.com/hwa.html

Ravenscar Nights
A shared-world mailing list for the creation and enjoyment of horror fiction.
http://groups.yahoo.com/group/Ravenscar_Nights/

International Order of Horror Professionals
Our organization caters to creatives working in all disciplines related to horror, including: authors, writers, editors, artists, filmmakers, screenwriters, actors and musicians.
http://www.horrorprofessionals.org/

The Virginia Creeper: Horror Writer's Laboratory
A community for horror fans and fanatics from writer, Laura Wright. Includes horror writing discussion, resources, and general assistance.
http://www.vacreeper.com/horrorwriters.htm