What are some awesome really good scary animes?

Highschool of the Dead - Made me jump a few times.
Elfen Lied - Made me jump more than a few times. xD
Higurashi no Naku Koro ni
Another
Umineko no Naku Koro ni

If I can think of any others I'll add them on here later. :)

Lucky Star! (lolz sarcasm :P) srry dont know any XD

Elfen Lied is one very scary anime! some parts I really had to turn away that's how scary that anime can be..especially the dog part!T.T..also Higurashi and Highschool of The Dead are two scary anime as well.

Ghost hound, it's weird but SCARY!

Highschool of the Dead and Elfen Lied(for some)

death note is scary

death note ( not a lot of gore though , except the end )
higurashi-when they cry ( scary! )
elfien lied :D
anothr!

*Shadow Star Narutaru.
*Perfect Blue.
*Serial Experiments Lain (watch the episodes backwards or out of order, it will really f**k with you).

1.Death Note
2.Another
3.Higurashi no naku kori ni

I only know of Death Note and Elfen Lied. Then again, Death Note is more of a suspense, action thriller...rather than horror. It didn't really scare me at all, but it depends on the person.

Elfen Lied hasn't scared me yet, but there's A LOT of gore and it's quite suspenseful..

1. Akira
2. Aoi Bungaku
3. Berserk
4. Betterman
5. Blassreiter
6. Blood+
7. Blood the Last Vampire
8. Blue Gender
9. Boogiepop Phantom
10. Boukyaku No Senritsu
11. Chaos Head
12. Dance in the Vampire Bund
13. Deadman Wonderland
14. Descendants of Darkness
15. Divergence Eve
16. Elfen Lied
17. Ga Rei Zero
18. Gantz
19. Ghost Hound
20. Ghost Hunt
21. Ghost Stories
22. Hakaba Kitarou
23. Hellsing (that includes Ultimate and The Dawn)
24. Highschool of the dead (and OVA)
25. Higurashi no Naku Koro ni (that includes Kai and Rei)
26. Jigoku Shoujo (Hellgirl) (that includes Futakomori and Mitsuganae)
27. Kaidan Restaurant
28. Karin
I havn't found any of them scary yet, but they are great animes and they are under the horror genre. And who know maybe other people do find them scary. But I do know more if you want to hear more titles. To hear more titles just message me.

Vampire Knight!It's my favourite anime and it has 2 season,the 3rd doesn't come yet.Actually it's not as scary as High school of the dead or Elfen Lied,but this anime is a story about vampires so when a vampire drinks someone's blood,it acts really scary and the music plays in these parts are really scary too.Also,you will love the 3 main characters of the anime because they are very cool

Ghost Hunt
and Jigoku Shoujo (pic below)

Another
Mononoke
When they cry
Elfen lied
High school of the dead
Ayakashi samurai ghost tales
Gantz
There are many more anyone who thinks Kamina is the manliest man send me a message

Full Metal Alchemist Brotherhood