TrekSites
TOS Fan Fiction
Note: some sites contain adult material and you should read the disclaimers if you object to material intended for readers over the age of 18.
Anastasia's IDIC Site.  Great TOS fiction, but also X-Files stories as well as original fiction and poetry and music site links.
Djinn's Lair.  Great TOS fiction, focusing mainly on Spock and Christine, but also containing crossover fiction and other things.
FanFiction.net.  Every kind of fan fiction you can imagine!  This link is just to the TOS fiction, but go back to the home page and explore.  This site holds literally thousands of stories!
Gloria's Star Trek Fan Fiction Page.  Kirk and Spock friendship stories with some action adventure thrown in.
Lady Gueniver's Prostesting Natures Page.  Dedicated to Spock and Christine with lots of great fan fiction, both general and adult.
Nesabj's TOS Fiction Page.  Stories focusing on the relationship between Captain Kirk and the crew of the U.S.S. Enterprise.
KerJen's Fan Fiction Page Both Star Trek and Star Wars fiction.  Features Spock and Saavik stories.
Roisin Fraser's Fan Fic Page.  Star Trek stories set in the TOS universe as well as Roisin's own Akaren universe.
Saavant's Mostly Vulcan Fan Fiction.  Dedicated to Spock and Saavik.  Lots of good stories.
Selek's Sarek and Amanda Lair.  Dedicated to Vulcan's First Family.  Great Sarek and Amanda stories.  Warning: Most are Rated NC17..
Spock and Saavik.  Dedicated to Spock and Saavik, featuring fan fiction, fan art, book listings, fests, fan made movies, and more.
T'Thelaih's Vulcan Oasis.  Wonderful Spock stories set on a truly alien Vulcan, with lots of original characters.  Don't miss it!  Most are Rated NC17.
Visit our sister site, the Spock and Christine Mailing List Fiction Page.  Adults only please.  Lots and lots of original fan stories about Spock and Christine (what else?), links to member home pages, humor, and how to join the S/Cha Email List.
Miscellaneous Sites
1701DY's So You Like Star Trek.  Great site from Australia featuring all four series and the movies, lots of great pictures and other goodies.
The Roddenberry Store.  Formerly Lincoln Enterprises, Majel and Rod Roddenberry's official site for scripts and merchandise from all the Treks, "Earth: Final Conflict" and "Andromeda."
Where to find Star Trek fanzines...
Empire Books.  Jean Lorrah's home page where you can find "Night of the Twin Moons", Jean's Sime/Gen fiction, and Jean's pro books, including "The Vulcan Academy Murders."
Fanzine Archives, a registered lending library.  Authorized copies of vintage fanzines in Star Trek, Star Wars, and many other fandoms.
Knightwriter Press.  Literally thousands of zines in every fandom you can imagine and some you can't!
Orion Press.  Home to many of the best Trek zines available.
Poison Pen Press.  Home of Spockanalia, the very first Trek zine, Masiform-D and many other fanzines.
Cheree Cargill's home page, featuring new and old TOS fiction, mostly featuring Spock and Christine.  Separate archives for adult fiction and more general fiction.