Iron Man/Doctor Who: Machinations of the Heart(s) 1/? ; R
Title: Machinations of the Heart(s)
Characters: The Tenth Doctor, Tony Stark.
Genre: General (comedy, drama, introspection).
Summary: The Doctor and Tony Stark have work to do. The world's in danger, there are evils to defeat and the pizza's getting cold.
Title: Business As Usual
Fandom: Iron Man (Movieverse)/Doctor Who (Series 4)
Pairing: Implied Tony/Pepper.
Warnings: Crossover, AU, mildly cracky
Summary: Iron Man meets Supertemp. The world may never be the same.
Never Have I Ever (Doctor Who / Torchwood / Iron Man; Donna, Ianto, Pepper Potts)
Fandom: Doctor Who/Torchwood/Iron Man
Character(s): Donna Noble, Ianto Jones, Pepper Potts
Notes: For the prompt Ianto, Donna and Pepper end up at a secretaries'/assistants' conference and have a conversation about their bosses
TITLE: "Supply and Demand"
AUTHOR: Cathryn (</a></b></a>remindmeofthe)
RATING: PG for a bit of language.
GENRE: Gen. Crossover with the Iron Man movieverse.
CHARACTERS: Martha Jones, Tony Stark, the Master, Pepper Potts.
SUMMARY: Everything has changed, including what it means to be a superhero. Takes place during the year that wasn't.
SPOILERS: Doctor Who 3x12 and 3x13 ("The Sound of Drums"/"The Last of the Time Lords"). General spoilers for the Iron Man movie, but nothing plot-specific.
This is all I can find. I know I've read some other ones. I'll continue to track those down :)