Fanfiction
The site I exhaust from overusage and might go into rehabilitation for.

Adult Fanfiction
Not much different from Fanfiction.net but has the more NC-17 (VERY explicit) stuff. A great read.

RECS at Paperpilots
Various fandoms

Trinity Slash
Just check it out. It has quite some interesting slash links.

The Tenth Muse1 Fanfiction
Well written work in various fandom slash and/or not.

Breagerey
Neat and easy to navigate Oliver/Percy slash fic site

Chocolate Frog
A wonderful site for Snape freaks (like me)

A very well done archive of many fandoms

Mainly Spike/Xander fanfiction site

The Snape/Lupin Fuh-Q-Fest

All Xander. As dom and sub.

^_^