I have a whole rec list here for OFCs who aren't Mary-Sues, to which a number of commenters have contributed.

You should also check out spn_women, which had a wonderful ficathon this winter and is chock-full of good canon characters, running the gamut on genre and rating.

And for some . . . well, not entirely shameless self-pimping, I have Mistaken for Strangers, which I'm told does well on the OFC front.

Did you ever read "The woods are lonely, dark and deep" (http://www.fanfiction.net/s/4954718/1/The_Woods_are_Lonely_Dark_and_Deep)(yes, yes. I might have recced that sometime before...)?

Well, Kathleen Hudak, from "The Benders" is featuring strongly in it, and she is a very kick-ass character. I might like that story - and even MORE the sequel - more for her than for the Winchesters. so, you might like it (but it's LONG)

A good man is hard to find (http://community.livejournal.com/spn_gen/287772.html?thread=843548) has a strong female character, but I must warn you, we learn about her in flashbacks, so... well.

Stay (http://dodger-winslow.livejournal.com/78200.html#cutid1) has a fantastic OFC, and I love this story with all my heart. It features 10-year-old-Dean (and 6-year old Sam and unconscious John), so maybe the boys are too young?

real men don't make cheescakes (http://apocalypsos.livejournal.com/1086261.html) is a teen-chester fic, and funny. The girl is quite smart and funny - I liked her.

Accidental documentaries (http://tassosss.livejournal.com/55210.html#cutid1): As Class Historian, Antonia is determined to make the best high school documentary that anyone has ever seen, but the first few weeks of school bring to light more than expected when a freshman girl goes missing, the new kid Dean takes an interest, and old traumas may be the key to the present.

It's Antonia's POV, and though Dean and Sam appear, it is actually more about her and her friends. It's really, really good, even though their only teenagers.

I might have more, but I have no tag for "strong females" in my bookmarks. I should change that...

roque_clasique wrote one of my favourite OFC's ever in Structurally Unsound (http://roque-clasique.livejournal.com/7401.html), which is part of her Drive 'Verse but can be read on its own, I think. Claire is a fantastic character.

And if you don't mind self-recs, I wrote a tag to 5.03 which features Lindsay: We Will Not Regret The Past, Nor Choose To Shut The Door On It (http://ratherastory.livejournal.com/31890.html). (I think the story might be shorter than the title ^_-)

sawedoff_recs did a rec post of stories about women in Supernatural (including OFCs) here (http://community.livejournal.com/sawedoff_recs/73208.html).

Edited 2010-05-28 03:28 pm (UTC)

My absolute favourite is the Strangers and Angels verse, the first of which is:

http://www.fanfiction.net/s/2748108/1/Strangers_and_Angels

The female lead is Jo and it revolves around how the Winchesters tie into her already existing family. She's more of a mother figure than anything else and there is no romance.

I totally second this. This 'verse is awesome. And Jo kicks ass.

http://happywriter06.livejournal.com/266572.html - There's some Gen and Het in here.
http://happywriter06.livejournal.com/222901.html - Het recs.

Whiskey Fire and Shadow (NC-17) - caelumi
During times of war, sometimes comfort is found in the least expected of places. [Sarah/Jo]
http://caelumi.livejournal.com/41575.html

If you don't mind wee'chesters then you should give the Aunt Sissy stories a try. She's a very well-realised character and the boys are adorable too (even John is well-written). They're the first three stories on the author's list: Out of Harm's Way, Safe from Harm, and In Harm's Wake, all by Sylvia Bond...
http://sylvia-bond.livejournal.com/18393.html

Thank you all so much! Four days later and still plenty to read... I love this community. :)