These are some of my favorite women-centric stories over the years. (I kept it to one fic for each character, which was the hard part...)
(Avengers)
Natasha:
White Blank Page by AlliSnow
A Natasha/Clint spy thriller. Other characters show up, but Natasha is central to the story and it felt to me like a 70000 word love letter to her character.
Pepper:
Her Way by tigerdreams
Maria:
Ask No Questions, Hear No Lines by ienablu
Darcy:
the radio plays just the perfect song by TLvop
(Leverage)
Sophie:
Being Sophie by Lear's Daughter
Parker:
Not for the Novice to Attempt, Or The Mrs. Mann-Formsby Job by scintilla10
Tara:
How Tara Learned to Stop Worrying and Love Patsy Cline by hannasus
(SGA)
Sam, Teyla and Jennifer:
Finders: credits for a AU tv series vid by Sholio
Jennifer:
Nothing's Fair in Fifth Grade (even if you skipped it) by tartanshell
Teyla:
Three Lessons in Athosian History by penknife
Miko:
A Candle Against The Ocean by Ryuuza Kochou
(Buffy & Angel)
Dawn:
A Girl Made From Sky by Doyle
Faith:
The Uninvited Guest by Yahtzee
Cordelia:
Another Life by Rheanna
(FMA)
Olivier:
A Girl Worth Fighting For by bookelfe
Madam Christmas:
Notorious by bob_fish
Riza:
Take Aim by Public Displays of Lust
(Chuck)
Sarah:
Creator, vid by talitha78