For your first request I have an author rec because her fics are too numerous to mention

k hanna korossy (http://www.fanfiction.net/u/946711/K_Hanna_Korossy)

She writes tags/codas for about every single episode starting from the pilot to season 5. So what ever coda your looking for she'll have it. Most of her fics are sam-centric as well

Oooh, I love her fics. Haven't read all of them yet but every one I've read I've loved.

It might take you awhile to read all of them hahaha

Tag/codas--
Swan Song: Reconstruction (http://mollyamory.livejournal.com/7615.html) by mollyamory

Sam & Castiel--
You Were Just So Conveniently There (http://wistful-fever.livejournal.com/217292.html) by wistful_fever
The Mountains In Reply (http://unoshot.livejournal.com/2406.html) by unoshot

Outsider POV--
Accidents Will Happen (http://community.livejournal.com/spn_gen/322823.html) by holli
The Idea Of An Island (http://eighth-horizon.livejournal.com/42794.html) by eighth_horizon
That's Me In the Spotlight (http://vorpalblades.livejournal.com/6642.html) by vorpalblades

Victor Henrickson <3333333--
Breathe One, Sister (They Pass Me By remix) (http://community.livejournal.com/remixredux08/56602.html) by dr_who_dre
The Passenger (http://hansbekhart.livejournal.com/330449.html) by hansbekhart
Revelations (http://marinarusalka.livejournal.com/408109.html) by marinarusalka

Sam/Ruby--
Threshold and Tolerance (http://valiant.livejournal.com/80401.html) by valiant

Stanford-era fic--
Hamartia (http://rei-c.livejournal.com/586329.html) by rei_c
no one knew me, look right through me (http://rememberbefore.livejournal.com/27717.html) by rememberbefore

:)

ah sorry about the typo. Should be "Breathe On, Sister." But yeah, hope you enjoy!

I was going to suggest "The Idea of an Island" and "Revelations!" I &hearts those soooooo much!

*flails* This list is gorgeous! And I have not read any of these, thank you so much! And organized by topic, too...

This community is making me so very happy and full of procrastination not that I mind.

Please to ignore if you find self-pimping unseemly.

http://ella-menno.livejournal.com/100171.html (All Belief Is For It) is Victor-centric, post Jus In Bello.

http://ella-menno.livejournal.com/79215.html#cutid1 (and then there was one) is Sam POV, post-ep for The Magnificent Seven (S3 premier ep.)

Eep, I'm so bad at tags. The Victor fic (Vic Fic?) is called "all belief is for it," and the Sam-POV is "and then there was one."

Clearly I am allergic to capitalization.

Heh, I do not mind at all, I know I would do it if I had the chance. And hey, you know what you do best.

Thank you for both of these! I'm going to be a busy reader, aren't I... XD

I really think you should read In Reverse (http://www.fanfiction.net/s/2787883/1/In_Reverse) by sodakey.
Summary: After Faith, a job has the boys looking for missing hikers in Wyoming. While Sam worries it’s connected to what happened to Dean ten years ago, Dean wonders if Sam would be better off back in the world of normal.

This is recced often here so it's not just me. It's Season 1 and Sam and Dean run into friends of Sam's from Stanford while working a case. They even all end up staying together in the big house of one guy's family so there is a lot about Sam's friends changing view of Sam and how they see Dean.

Yupp, read it. One of the classics (I've got some more, look further down!)

Ooh, sounds interesting! Thank you for the rec, I haven't read this one. :D

Sam/Castiel friendship fic:
Building Rome (http://archiveofourown.org/works/103677/chapters/142466)
Summary: Rome wasn't built in a day. Neither were Sam and Castiel's friendship.

Ooh, I did get to find this one. It is pretty and shiny and I have it on my favorites list.

Oh, and some Mystery Spot fics (I went crazy a few weeks ago scouring for as many as I could find, lol):

Looking for Peace of Mind (http://www.fanfiction.net/s/5533316/1/Looking_For_Peace_of_Mind)
Summary: Coda to "Mystery Spot." Sam had read Dean's journal over and over in the months his brother was gone. Now, something was bothering him. Something he'd read. Did it really exist? Or was it just another of the Trickster's fabrications?

You Slay Me (http://www.fanfiction.net/s/5303415/1/You_Slay_Me)
Summary: Mystery Spot missing scene: In a loop full of the unexpected, he'd still never expected it to happen like this.

Slow Poison (http://www.fanfiction.net/s/5189533/1/Slow_Poison)
Summary: Mystery Spot missing day: The taco wasn't funny at all.

Wednesday's Child (http://www.fanfiction.net/s/4271137/1/Wednesdays_Child)
Summary: Mystery Spot/Jus in Bello tag: Sam's different, and Dean doesn't understand why.

Just Want a Glimpse to Know You're There (http://www.fanfiction.net/s/4145447/1/Just_Want_a_Glimpse_To_Know_Youre_There)
Summary: Coda to 3x11, Mystery Spot: The trickster was left behind by two hundred miles and three days, but Sam still wasn't Sam. Told from Dean's POV.

The Silence and the Noise (http://www.fanfiction.net/s/4144488/1/The_Silence_and_the_Noise)
Summary: Tag to 'Mystery Spot.' Dean died, and Sam had to learn how to live alone. Then the Trickster snapped his fingers, and Dean came back...but Sam didn’t. Even with Dean by his side again, he’s still living alone.

Holding Home (http://www.fanfiction.net/s/4753546/1/Holding_Home)
Summary: It was a long time to live without a soul. Tag to Mystery Spot.

Nothing Matters But the Part with the Numbers (http://pyrebi.livejournal.com/22843.html)
Summary: It would be almost frighteningly easy to step away from a time loop and simply...forget about it for a bit. Not on purpose, of course, but you know how things come up. And while it may only be a little while for the demigod creator, that could be forever in the mind of the only human who doesn't reset.

Free to Be You and Me:
Nothing Man (http://www.fanfiction.net/s/5495046/1/Nothing_Man)
Summary: AU coda to 5.03. Dean goes to Oklahoma after hearing about Sam's encounter with the hunters. What he finds when he arrives horrifies him.

Destruction (http://www.fanfiction.net/s/5410031/1/Destruction)
Summary: Spoilers for 5.03 -- Sam tests how serious Lucifer is about his promise warning: suicide attempts

Forgiveness is an Attribute of the Strong (http://dontknowmyname.livejournal.com/54913.html#cutid1)
Summary: A tag to 5x03: Dean let Sam walk out this time but he realizes now just how wrong he was. He’s not ready to let Sam go. There’s too much that needs to be said, too much left to be fixed.

Never Again
Summary: Lucifer's vessel. The words echoed in Sam's head. He won't let him win. Sam calld Dean. Dean races to stop him. Set after 5x03.

The Song Remains the Same:
Of Angels and Airwaves (http://community.livejournal.com/creators_hands/46473.html)
Summary: Coda to 5.13- Sam doesn’t quite make it back in one piece and Dean is there to take care of him.

Benders (I'm just copying from my bookmarks. Some may be more about Dean than Sam. Though, dunno how that happened. I'm such a Samgirl. lol):
You Pick the Animal (http://www.fanfiction.net/s/2805156/1/)
Summary: Inspired by 'The Benders"...what if they had decided to hunt Sam instead of trying to kill him?

Brought Back (http://www.thestade.com/khksn23.html)
Summary: Sam Winchester ran.

Proximity (http://www.fanfiction.net/s/2815328/1/Proximity)
Summary: Tag for The Benders. Dean and Sam get deeper into the woods, and not by choice. Dean thought Sam was safe with him, but it was more of a hope than a fact.

(http://www.fanfiction.net/s/5416493/1/Never_Again)

(Sorry about the link mess up with these):
Never Again (http://www.fanfiction.net/s/5416493/1/Never_Again)
Summary: Lucifer's vessel. The words echoed in Sam's head. He won't let him win. Sam calld Dean. Dean races to stop him. Set after 5x03.

The Song Remains the Same:
Of Angels and Airwaves (http://community.livejournal.com/creators_hands/46473.html)
Summary: Coda to 5.13- Sam doesn’t quite make it back in one piece and Dean is there to take care of him.

Here are the hurt!Dean ones, just in case you get in the mood:
Unprotected (http://www.fanfiction.net/s/2807014/1/Unprotected)
Summary: Dean's having nightmares about Pa Bender burning him, and then turning into John, who is really really angry because Dean "let" something happen to Sam

Never Forget (http://agt-spooky.livejournal.com/9456.html)
Summary: An epilogue to The Benders. Dean’s more hurt than he lets on and Sam takes care of him.

Words Unspoken (http://wolfling.livejournal.com/233756.html)
Summary: Sometimes there's more said in the dark and the spaces between words than is actually spoken.

Wounds (http://mellaithwen.livejournal.com/16902.html)
Summary: Hiding things never did anyone any good.

Lucifer Rising:
The ABC of Limp!Sam - S (http://captainlon.livejournal.com/284899.html)
Summary: Chapter 19: S - Suicidal
- Alt. ending to "When the Levee Breaks" and "Lucifer Rising"

4.22 Coda (http://authoressnebula.livejournal.com/799804.html)
Summary: Post season four, Sam is still having nightmares about Dean's death from the hellhounds. Dean comforts his little brother, and it turns out that Sam's been hiding his nightmares.

Homecoming (http://samidha.livejournal.com/1102847.html#cutid1)
Summary: Sam and Dean deal with reality in the only way that makes sense: together.

Detox (http://community.livejournal.com/no_candle_mom/56157.html)
Summary: Starts in the last 2 minutes of 4.22. Sam and Dean make it to safety with Castiel’s help, but Sam still needs to purge himself of the demon blood.
This time, makes the last time look like a walk in the park.

ooooh, thank you for all of these! And most of which I'd never seen before, awesome. You'll keep me going for a while here... XD

When the Levee Breaks:
A Little Too Much Nothing http://mikiya2200.livejournal.com/5295.html
Given Up http://mikiya2200.livejournal.com/4582.html

Set between season 3 and 4:
Take care, Sammy http://mikiya2200.livejournal.com/13656.html
Coming Undone http://www.fanfiction.net/s/4598211/1/Coming_Undone
This one doesn't really fit (it's more a tag for 4x2) but it deals with Sam's emotions about that time

I had one for the Benders but now I simply can't seem to find it! :-(

Sam and Castiel
Detox http://www.fanfiction.net/s/5741238/1/
Cleanser http://www.fanfiction.net/s/5785067/1/

Outsider POV I thought this one was really sweet :-)
Drawing A Blank http://www.fanfiction.net/s/5929807/1/

Swan Song
KICKING THE DEVIL'S ASS http://www.fanfiction.net/s/6298777/1/

Post Swan Song
The Wall http://www.fanfiction.net/s/5979923/1/

Born Under a Bad Sign
Residue http://www.fanfiction.net/s/3384272/1/Residue

The Song Remains the Same
Thank You http://mikiya2200.livejournal.com/6454.html

clair beaubien (http://www.fanfiction.net/u/1671683/clair_beaubien) and authoressnebula do a lot of Sam-centric episode tags. :)

Yeah, I like everything I've read of both of theirs. Exactly the sort of thing I'm looking for.

You've got a lot of great recs already (I guess you'll be occupied for a while), so I thought I'd list a few communities relevant to your interests that you might want to check out once you feel like going on a treasure hunt by yourself:

spn_gen for a rather steady supply of gen fics
spngenlove for themed gen recs
spn_epific for episode tags and codas
bystanderfic and spn_outsidepov for outsider POVs
copsandhunters for "The Lawmen (and Women) of Supernatural"
sam_castiel and deancastiel are mainly for the pairings, but there are a good deal of gen fics there too.
spnmysteryyears for Stanford-era fics
spn_women for the female influence.

Don't be scared, not all of them are terribly active.
(and I'm so going to bookmark this thread...)

Eheheheheh, I knew a few of these but not all of them, thank you for the links! For sheer size I swear this fandom is a little overwhelming sometimes... but awesome. Definitely awesome.

Hey, here I am :-D

I just today read one of the most awesome fics with Sam taking care of sick Dean and astonishingly, sick Cas. So, it fits your Sam'n Cas request: Primary Care (https://freemailng6201.web.de/jump.htm?goto=http%3A%2F%2Fcommunity.livejournal.com%2Fspn_summergen%2F89006.html) That was how they got you: turned you into a mushball, made you fetch blankets and Doritos and vodka, made you whine to Bobby Singer about the unfairness of your life.

Outside-POV:
I have written one myself: In the closet (http://marlowe78.livejournal.com/2485.html): there is a monster, outside the closet.

Then these, all damn great:
http://community.livejournal.com/spn_summergen/88173.html The tomato-plant doesn't grow Mangoes: If you lived next door to the Winchester family in 1993, would you call Child Protective Services?

http://corvus-imbrifer.livejournal.com/6014.html
Strangers in Gilead:
There are strangers in Gilead. A tall, well-kept man named Ben Cartwright, very probably a Pinkerton-Man, though he never confirmed it, and a green-eyed, sweet-talking, scruffy traveller named William Carlyle. What they want, how they came here - why they came? Nobody know, least of all Miss Rose and her girls from the saloon.
This is the PERFECT western-story for Dean and Sam. Intriguing, mysterious, action-packed and full of evil and strangeness, not forgetting a loveable, believable heroine and lovely OCs. This is more than worth the read!

http://unhobbityhobbit.livejournal.com/150841.html
Conclusions:
"He hits you to teach you a lesson?"Anne clarified, Sam nodded. “Dean too?”
“Uh-huh,” said Sammy, “Dean more 'cause he's bigger and stronger.”

http://www.fanfiction.net/s/5488442/1/ Funny: When the boys are investigating a haunting at a college, two students think it'd be funny to lock Dean in "The Tombs." Until Sam catches up with one of them.

http://www.supernaturalville.net/viewstory.php?sid=1122&textsize=0&chapter=1
Broken Images: They brought in a wild animal as a patient, frightened and scared, wild hair and splintered soul. She lost the ability to be distant over time - and tried everything, to put this broken man back together
This is MOST awesome!

And, my personal fav:
http://dodger-winslow.livejournal.com/78200.html#cutid1
Stay:
Outside OPV - When breakfast on the road takes a deadly turn, Dean is the only one who can save his father's life. He's ten, he's alone, and the only way he makes it is if she stays.



Oh, and Cas being a bit awkward, I tried my hands in this as well:
http://marlowe78.livejournal.com/4969.html
Learn as you go: Written for the SPN comment-cuddle-fic meme, for the prompt: Cas wants to know why humans hug. One of the boys (your choice) explains and demonstrates. (I chose Dean, hope you don't mind ;-))

Oooh, another great long list of all kinds of things that I'm looking for. Thank you for this! You guys are great.

You said self-pimping was okay, so:

Sam and Castiel:
Knights, Kings and Sparrows: http://blueiris08.livejournal.com/37982.html
What Profits the Angels: http://blueiris08.livejournal.com/38358.html

Outsider PoV:
A Matter of Principle: http://blueiris08.livejournal.com/29108.html

I hope you enjoy them!