Hi!
I don't know if you have checked it already, but there are some in the wincestreading tag: http://wincestreading.tumblr.com/post/29820718523/au-alternate-universe-wincest-recs (http://wincestreading.tumblr.com/post/29820718523/au-alternate-universe-wincest-recs).
In the wincestreading masterpost there are also some different types of AU (fantasy, Swesson etc).

oh my god, thank you. I didn't even know about that blog.

Hope you don't mind self-recs:
Wrapped in Honey (http://lady-emebalia.livejournal.com/19053.html)
Summary: AU in which Sam is a monster who wants to buy himself somebody to feed on. Lucky him, Dean's on sale.

self-recs are always welcome - thank you!

It's really good too! I am eagerly awaiting the next chapter.

Here are two by sonofabiscuit77, though you've probably read these. I Hope you haven't because these are *SO* good!:)

A Life most Ordinary (http://archiveofourown.org/works/408747/chapters/677940)

Summary:

Sam and Dean Winchester are two ordinary brothers living ordinary small-town lives. Okay, so having a mother who was brutally murdered by one of America’s most notorious serial killers and a father who was forever mentally scarred by the event is not that ordinary, but the rest of their problems: marriage breakdowns and relationship failures, job disappointments and sexuality crisis, and Dean’s two kids, 9 year-old Jonah with his disturbing passion for the music of Lady Gaga and 6-year old Simon with his severe hearing loss, well they’re all completely ordinary. The only thing extraordinary about Sam and Dean is how they fell in love.

The Psychology of Genetic Attraction (http://archiveofourown.org/works/443438/chapters/757897)

Summary:

“…50% of of reunions between siblings, or parents and offspring, separated at birth result in obsessive emotions...”

This story begins in 2001 in a garage in Palo Alto when 18-year old Stanford student, Sam Sharma plucks up the courage to ask car mechanic, Dean Cooper, out for a cup of coffee. Their attraction is instantaneous and overwhelming, and the relationship that develops seems perfect. Except nothing is really perfect, and this particular love story started a long time before Sam and Dean even met.

Wincest non-hunting AU.

I've read the second but not the first. So excited!! I love sonofabiscuit's stuff. Thank you!

Edited 2014-12-19 03:21 pm (UTC)

You're so welcome! She is *wonderful*--have you read World's Forgotten Boys? (http://archiveofourown.org/works/716585/chapters/1327072) It's not the subject matter that you asked for but it's the very best "extra Winchester sibling" ever. :) !

omg, that looks incredible. She does plan on finishing it, right? I guess it's been written over a couple years, so

It's complete, pretty much--I think she was going to write a small epilogue, at least,I hope so. Still, I think you can still enjoy the story as it is. Mind you, I'm very pleased you haven't read it yet--excited for you! :D

I'm only a couple chapters into this (it's LONG), but I had to stop in and say omg I don't think I've ever laughed so hard and been turned on so much by the same fic. Awesome rec. :)

Douglas County by awabubbles, which just finished posting today. Although there are many recognizable Supernatural folks, there is no supernatural activity in the fic.

Summary: Prison AU. Dean Winchester is a new correctional officer at Douglas County Youth Services where he meets Sam Wesson, a fifteen year old inmate who's been charged with arson and the death of his parents. Dean finds himself increasingly protective of the young inmate, but as his personal life gets more complicated, Dean has to find out exactly how far he'll go to keep Sam by his side.

Blood Brothers by dont_hate_me01.

Summary: Three years ago Sam run away from his mafia family, now the FBI wants him to turn on his family, but at the same time his brother/lover found out where Sam is. Sam’s scared Dean will kill him and he has some difficult decisions to make.

And if you want "really out there AUs" for Sam/Dean, I've got pirates and a Battlestar Galactica (the original) fusion...

Dangerous Waters by virtualpersonal and brimstonegold.

Summary: Two decades ago, Dean Winchester was betrayed and left for dead by his own father. Now, the so-called Pirate King is poised to take revenge on the father who cast him out, and the brother who took his rightful place and has been living the high life. When Sam Winchester sets sail to collect a bride that he does not want, his journey is cut short and he finds himself at the mercy of a hard, bastard of a pirate who hates him and orders him to his bed. Inexplicably drawn to this mercurial and sometimes cruel man who holds the power of life or death over him, Sam walks a dangerous tightrope using everything in his arsenal to convince Dean to change course and see him as partner and ally rather than as his pawn and victim.

The Winning Scenario by the same duo.

Summary: Disguised as a merchant during an information gathering mission on a gaming and pleasure station, Captain Dean hits the jackpot. Surprised to learn his winnings include a night with a pleasure slave, he is ready to reject the slave's services until he learns that the slave is human. There is no way he will leave one of his kind behind, no way. The pleasure slave, Sam, has his own secrets. Cylon torture and conditioning to make him a suitable commodity for the slave trade has left him with half memories, nightmares and psychological problems. If he knew Dean was a colonial warrior, there is no way he would leave with Dean and no way he would go anywhere near Dean's destination, the Battlestar Galactica.

And a little more sci-fi...

Forced Entry by virtualpersonal and cha.

Summary: AU. Futuristic. Captain Winchester doesn’t like people messing around in his mind. He’s had some run-ins with telepaths and he hates them all. Too bad he's been paired up to work with Sam Wesson, one of the highest rated Telepaths in the Tel Unit.




Edited 2014-12-19 03:54 am (UTC)

oooo, so many! Thank you so much!

Don't let the tags scare you away! This is one of the best novels I've ever read in my entire life.

Restraint (http://archiveofourown.org/works/61002/chapters/80646) by darkemeralds

This looks so fascinating - and so long! Thank you so much for the rec.

Again with the seconding of recommendations. It is excellent. And the accompanying art is pretty amazing too.

Close Your Eyes (http://sonofabiscuit77.livejournal.com/55464.html) There are some relationships so taboo they’re irresistible... After John and Mary break up when Sam is 11, Sam moves away with Mary and his new step-father while Dean stays in Kansas with John. Fast-forward 12 years and John is dead, Sam’s just returned from Europe, and Dean’s gone and married a billionaire and become a male model. As the boys reconnect, Sam becomes increasingly fascinated by this successful, happily-married version of the big brother he barely knows, a fascination that soon turns into an overwhelming mutual obsession.

I can see Dean as a male model. I'd watch him for sure. :)

This looks awesome - thanks for the rec!