Bolded fics are my favorites.

GLEE

Klaine

• Just One Wish by CP Coulter
  Summary:  It’s AU (all standard warnings follow, I know how people feel about AU). Blaine’s a servant boy of a Hunting party that captures magical creatures. One day, they bring home a wood nymph.
• Of Art & Broken Hearts by of_a_cresendo
  Summary: AU: splitting off from where Kurt visits the Warblers. In ten or so years, Blaine paints a beautiful man who’s strangely familiar. Only he’s not quite the same, he’s broken and tired, and there are track marks up his arms. Of painting sessions, realizations, broken hearts and capturing the essence of a person in a portrait.
• Of A Soul by fishwrites
  Summary: (A Glee & His Dark Materials fusion) Set in a world where people possess daemons, manifestations of a person’s soul in the form of an animal companion. Kurt dislikes McKinley for many reasons. Being the only boy with a daemon who still hasn’t settled makes him an social outcast. When Karofsky crosses the line, Kurt is left with consequences that he isn’t prepared for. (Based on canon events in an AU world)
• How Kurt Hummel Got Married, Fell In Love, and Met His Dream Man (In That Order) by aubryli
  Summary: From this prompt on the glee kink meme: As the younger brother (with Finn being the eldest and therefore will inherit all of Burt’s land/property/money), Kurt is sold to _ _ _ _ _ (insert name of any given male on Glee) as a husband(/wife - if you prefer this wording more). At first Kurt is dead set against it, he doesn’t want to be married to some random man. However, one earth shattering orgasm on the wedding night soon changes Kurt’s mind and he becomes an insatiable cockslut for his hubby.
• Paper Gangster by mylifeasasassymannequin
  Summery/Warnings: contains Kurt’s original three “screaming orgasm” scenarios, discussion of infidelity, hints of gay-boy sex, and processes otherwise dramatic.

CrissColfer

• Of Searching and Sour Cream by mittenconfetti
  Summary: Chris is trying to adjust to a life of being dumped, alone and in love, and figuring out what comes next despite the rules of modern society.
• Breathless by certaintendencies
  [Part One] [Part Two] [Part Three]
  Summary: Darren can’t help but notice Chris has a Neck Thing. Obviously, they should have sex.
• Love and Affection by aristide
  Summary: Chris and Darren spend some time together. Stuff happens.
• One-Time Thing series by flyblckbirdfly
  [Want] [You’re A Dick, Darren] [Your Everything] [Too Close] [May or May Not]
  Summary: Cockslut!Darren

Handerson Fourgy

• Something’s So Sick by threepwillow
  Summary: which I guess is more like mild R erotica than actual porn, so that might have been false advertising. but yeeeaaahhh
• H4 with a Mountain of Angst by threepwillow
  Summary: The first day at McKinley without Kurt is - weird.
• 4G Network by threepwillow
  Summary: Do you guys know about that whole thing where Blaine and Kurt have twins? Surely you’ve cottoned on by now.
  At any rate, have some incesty phonesex! I don’t do headers. ~6500 words, some incest, all phonesex. That’s what you get. BAM.
• Burned Paradise by sleepinthenude
  Summary: Just like that fucking ’80s song, Cameron just wants Everett to want him.
• Love’s What You Hate by devonwood
  Summary: Just like old times, Cameron thinks wryly as he bobs his head and resumes the motion of his hand. He half expects to feel the firm weight of Everett’s hands on his hips before he realizes that’s not going to happen this time. Not ever again.

Kurtofsky

• The Kurtofsky IMs by tessisamess & wherethewind
  Summary: Here, you will find an alternative fic written almost exclusively through instant messages. We’re here to make you laugh. Make you cry. Make you a little uncomfortable at times. But to always, always try and bring something fun and positive to your day.
• Towel Boy by tessisamess & wherethewind
  Summary: Kurt starts a GSA. The only problem is, it isn’t OK’d by the school, first. The GSA gets shut down, and Kurt’s punishment? He’s now the towel boy for the boys’ sports teams. There’s a ton of other plot (hell, it’s 60k, of course there is) but that’s the starter plot. The Kurtofsky aspect is surprisingly light on angst, the other aspects? Not so much. Oh, and it has our first version over of Rossman in it. 
• Zompocalypse Now! by tessisamess
  Summary: After a zombie apocalypse, Dave and a friend find Kurt stranded on the side of the road. His friends and family are dead, and Kurt has a secret.
• Not So Simple by tessisamess
  Summary: When Azimio goes too far, and Karofsky accidentally outs himself, all hell breaks loose. Eventual Kurtofsky. Original prompt here.
• Wait For Me by tessisamess
  Summary: “Wait for me” in six acts.
• The Proposition by tessisamess and gleekalicious
  Summary: Kurt’s pretty sure nothing sucks worse than being the only gay kid in the changing rooms. It’s hell but he does a damn good job of skipping gym for three years before he’s caught and forced back. Luckily, Coach Karofsky seems to be on his side, and when Kurt accidentally sees a lot more than he was supposed to, he starts to see his coach in a whole new light. After all, who better to lose your virginity to than a (slightly) older, experienced man with a thing for ‘twinks’? There’s only one problem: Coach Karofsky refuses to give in to the idea, namely because Kurt’s not even legal. On the plus side, Kurt’s birthday is only three months away…

Blesse

• The Start of a Beautiful Something by pyroclastic
  Summary: Blaine Anderson is the owner of a failing café in West Hollywood. Closing the place down seems all but inevitable until one day, minor celebrity Jesse St. James walks in.

Suck

• I Swear In Days Still Left by sleepinthenude
  [Part One] [Part Two]
  Summary: Puck can’t even explain how he fell for a Hufflepuff. Seriously. What the fuck even is a Hufflepuff? And Sam motherfucking Evans of all the Hufflepuffs. With his goofy fucking hair and his too-wide smile and the casual way he leans with his hands in his pockets and the soft color his eyes get in the night and the easy way his fingers brush over skin…
  
  Fuck.

I will add more fics with other of my favorite ships and fandoms as time goes on.