[Anita blake vampire hunter x harry potter crossover fanfiction]

There is a story on Archive of our Own titled Black Magic.

Black Magic by Moonlight - A Harry Potter/ Anita Blake crossover - Chapter 1 - beren - Harry Potter - J. K. Rowling [Archive of Our Own]

[Creature Harry]

While at the Dursley’s after 2^nd year Harry starts going through some changes. He develops scales, a red stripe in his hair and sharp nails and teeth. He can also kill with his eyes when scared and he accidently kills an unspeakable in the Leaky Cauldron.  He escapes under his invisibility cloak and goes to Knockturn Alley. He realizes that he is getting powers of a basilisk. 

[Looking for hp/lm]

It could be Abused by amethystangel. Here is the address for the story.

http://hp.adult-fanfiction.org/story.php?no=544211444.

[Harry Saves Snape's Relative]

It is a story called 'Meeting the Family' by bleudiablo. Here is a link to the authors website. http://web.archive.org/web/20080619043328/http://www.angelfire.com/indie/bleudiablo/fiction.htm

[help find a story]

It is "Fulfilling A Destiny" by Vampirezdarkgurl. It can be found here http://hp.adult-fanfiction.org/story.php?no=600018253. It is the sequel for "A Friend For Life" by the same author.

[HP/Twilight Crossover]

This might be the one you are talking about. Here is the link.

http://www.fanfiction.net/s/8556834/1/Make-Me-Feel-Safe