1.
okay, it's a HiM fic... That narrows it down. I know I've read this but it was a while ago... Hmmm... Ah! Found it.

The Ring by Toomi8

2.
Pretty sure this is the treehouse one. Ah, yes. That's it.

The Cold Treehouse by SuperBek

3.
Krypto! Such a fun challenge series.

Walk the Dog Challenge 2: Doggoneit by Hatman

4.
part of me says I've read this and another part says it's not familiar at all... Ummm... Scrolls through eligible stories list... Aha!

Dessert by 90stvfangirl


5.
The one where Dr. Klein jumps to conclusions aka:

A Personal Favor by Queen of the Capes

6.
The micro short of micro shorts:

The curse of super-hearing (Drabble) by Kathryn84

7.
more Krypto!

Walk The Dog Challenge 4: A Walk In The Park by bakasi