AKA Joss Whedon: the best thing to happen to Natasha Romanoff, yay! Have some of my favorite fics (and podfics):
I have seen nearly every city by pprfaith - Buffy Summers and Natasha Romanov keep meeting. Eventually, they stop questioning it. (Avengers/Buffy the Vampire Slayer crossover, R, gen) / With
podfic by reena_jenkins Run to the sea by irnan - They're wound together in a spider's web of coincidence and chance meetings, of work passed on and friends in common. (Teen And Up Audiences, Bucky/Natasha implied) / With
podfic by susan_voight The 'Ashes' series by SugarFey - She's been turned upside down and inside out so often she doesn't know who she is anymore, but she knows who she wants to be. (Teen And Up Audiences, Clint/Natasha implied)
Romanoff by ashen_key - “Not Romanova?” Coulson asks.
(They've been calling her 'Natalia Romanova' for years.)
“No,” she says. (General Audiences, gen)
And let's not forget Maria Hill:
Five Secrets Maria Hill Would Like To Pretend She's Keeping From The Rest of SHIELD by psocoptera - Fury is a lying liar, Coulson is a good coworker, except when he's not, and Maria never meant to work for SHIELD. (General Audiences, gen)