Links
Some of my favorite websites to visit, in no particular order . . .
Fanfiction.Net
The Holy Grail of fanfic nuts everywhere. Not certain about how many fics are archived here, but it has to be near or over 100,000, since there are almost 70,000 for Harry Potter alone. The quality of the fics can go from very good to downright awful, but it's a nice place to start.
Fiction Alley
If ff.net is the Holy Grail for fanfic nuts, then FA is the Holy Grail for Potter freaks. It doesn't have as many fics as ff.net, but all of the fics are reviewed by real people who are good at what they do, so the quality is much better. There's also Ficion Alley Park, a message board that a lot of the authors use. Home to Cassandra Claire's Draco Trilogy.
noire.sensus
A nice HP slash archive. The fics have all been hand-selected, so they're very good. Features quite a few pairings, most of them yaoi, with a few yuri. Contains NC-17 as well as lower ratings, so if that's your thing . . .
Writer's Univeristy
A nice fanfic author's resource. Has some interesting articles, as well as tips for writing and the like.
Elfwood
Really nifty art site, to which I also belong. This is mostly for beginners, so there's some not-so good stuff (including mine) in there with the good stuff. This site is huge, however, and you can find a lot of quality works.
Epilogue
Elfwood's older sibling. There are a lot of professional artists with galleries here, so the amount of excellent art is almost overwhelming. I definitely recommend that you check this out if you're looking for good fantasy/sci-fi art -- some of the galleries you'll find here are flat out amazing, from Socar Myles' to Stephanie Law's.
Some of my favorite fics - all I have here are links and ships (for HP), since writing out individual summaries for each would be exhausting.
Animorphs
Circle of Magic
Diadem
Digimon
They Claimed He Was My Brother
Everworld
Harry Potter
Harry/Draco
It All Started at the Bookstore
It's Not Christmas Without You
Monday in the Cafe with Joanne
Harry/Remus
Harry/Ron
Hermione/Ginny
Hermoine/Penelope
James/Lily
Percy/Oliver
Ron/Draco
Sirius/Remus
Shadows of Live - School Shadows
Tom/Harry
No Ship/Many Ships
First Kiss
Playing the Game, Living the Lie
Lord of the Flies
Rent
Aftermath
Breakfast
Chill
Cup O' Noodles
Detachment
Navy
Peanut Butter
Right Now
The Essence of Love
To Hear Your Voice Again
What if No One's Watching
The graphics used in the layout of this site are from the Harry Potter doujinshi Tension Living With Muscle, by Koge Koge House, and Roof Garden, by R. R. O. C. and Kokiden. Here is the site where the scan came from.