TV Fanfiction Archives
If you are looking for cartoon-oriented archives, go here; if you are looking for BtVS or AtS archives, go here.
Blake's 7
The Hermit Library
Liberated
Pink Asteroids
Charmed
Charmed Fictions Center
Dr. Who.
A Teaspoon and an Open Mind
West Wing
Fanfic with Footnotes
West Wing Fanfiction Central
X-Files
The Gossamer Project