sf_drama's latest OTT on scary shit that's scary, complete with links, youtubes, and pictures. Obviously, I'm not reading a lot of this until I am safely in my cubicle with artifical lights glaring down at me, but you know, go for it!
SFD's creepypasta tag for added creepy.
Recs: Fiction tag I use for hypertext stories, etc, but hey, in honor of Halloween, I'll relink what makes me not sleep, eh?
Ted's Caving Page
Dionaea House (all links to this hypertext in my entry here.)
Indian Lake Project
Fiction (Multi-Player, also RP)
SCP Foundation - okay, I rec this a lot, because this is seriously cracky fun, and can be done in bites instead of single-sitting. It's a lot of creepy but it's also a lot of neat, especially if you know your urban legends and your fairy tales and you recognize what they're describing before there's a name. They pull from several cultures of monsters and beings, but the really fucked-up stuff is honestly the goddamn artifacts. It makes you really stare at your breakfast cereal.
Keep in mind that the individual SCPs also sometimes have attached fiction, experiment logs, and some of the personnel have logs too, which can make it just that more fun, since there's a lot of overlap in some and some stories can be told entirely by piecing several SCP reports together. Which I did have a color-coded chart for SCP-808's thing, why do you ask?
Fiction (Multiple Author, etc) and Other
Creepypasta - the center of the bite size terror thing. They're hit or miss for a lot of people, but trust me when I say, the ones that seem dumbest on first read put at least three people under the table in terror. Collectively they hit a range of terror.
Candle Cove - related to Creepypasta, but a thing all by its lonesome. It's in essence a very neat crossover of creepypasta and ichorfalls people (apparently from person on /x/ who loved the original story and expanded to combine the original textual with the media).
Ichor Falls - sort of new to me. Origin of Candle Cove text version, but there's other stuff there as well.
The Bad, Scary Place - it was recced on sfd, thread link here. I am checking it tomorrow.
SFPA Halloween Reading - from ranalore - horror poetry! Updating through Halloween.
Pseudopod - from prairiedaun - audio horor stories! Well, this will help me sleep at night.
Wormwood - from lydiabell - audio horror yay!
Bluebird by basingstoke - recced by carnadosa - Torchwood/Addams Family crossover
The Chainsaw Job by annerbhp - recced by lurkerlynne - Leverage and zombies!
Teeth - recced by carnadosa - Harry Potter
X-Manson by D Benway. I read this parallel with fyrdrakken way back when we were both in X-Men, and I don't think either of us slept that night.
Due South Rec List of Zombie Stories - from akamine_chan - Zombies! Actually, I know there are some themed rec lists for zombies, vampires, et al. Hmm.
Also, the Scary Clown - recced by carnadosa - Vid
The Girl or the Weapon by kiki_miserychic - recced by carnadosa - Firefly
Wanna Buy a Ghost - recced by carnadosa
Purgatorium - from carnadosa - point and click game
Anything anyone wants to add in honor of Halloween? I'll add links here. If you have a favorite terrifying fanfic, please link up! I'll keep compiling through Halloween if I get any responses.