Crossovers

Fandom: Star Trek: Deep Space Nine/Doctor Who
Title: An Element of Blank
Author: Carmen Sandiego (Teaspoon)
Era: pre-"Rose"
Characters: (Doctor Who) The Doctor (Ninth), many DS9 characters
Length: Short
Summary: Wormholes, pubs, darts and a big fight scene. Written for the 2005 Multiverse challenge.

Fandom: Harry Potter/Doctor Who
Title: Exterminatus
Author: Casira
Genre: Humour
Characters: Harry Potter: Sirius Black, James and Lily Potter.
Length: Short

Fandom: Stargate SG-1/Doctor Who
Title: Hok'taur
Author: spastasmagoria
Genre: Adventure
Characters: SG-1: SG-1, Nirrti. Doctor Who: The Doctor (Ninth).
Length: Long
Summary: Nirrti's experiments into building a super-host have lead her to a certain Time Lord. SG-1 and the Doctor stop her from creating a host capable of command over time and space.

Title: Out of Africa
Author: loneraven
Characters: SG-1: Daniel Jackson. Doctor Who: The Doctor (Eighth).
Length: Short

Fandom: Heroes/Doctor Who
Title: Once Upon A Time
Author: selenak
Genre: Adventure, angst.
Characters: Heroes: Peter and Nathan Petrelli. Doctor Who: Martha Jones, Donna Noble.
Spoilers: Heroes season 2, Doctor Who series III.
Length: Medium.

Fandom: Stargate Atlantis/Doctor Who
Title: Burning A Hole Right Through
Genre: Adventure, angst.
Characters: Stargate Atlantis: Teyla, ensemble. Doctor Who: Martha Jones.
Length: Medium.
Summary: It's the end of the world as they know it, and they feel fine.

Fandom: Stargate Atlantis/NUMB3RS
Title: Classified
Author: Dira Sudis
Genre: Adventure
Characters: Stargate Atlantis: Ensemble. NUMB3RS: Don and Charlie Eppes.
Length: Medium

Fandom: Doctor Who/Discworld
Title: Interlibrary Loan
Author: DameRuth
Genre: Humour
Characters: Doctor Who: The Doctor (Ninth), Rose Tyler. Discworld: The Librarian.
Length: Short
Note: Part I of "The L-Space Trilogy".

(Multifandom) Fanfiction.net favourites list

Obviously this doesn't contain everything, only those stories archived on FF.net.

My FF.net profile (click Hide Bio on top right and click Favorite Stories)