A crossover with the anime/manga Kuroshitsuji/Black Butler. You can read it without having read the manga/ watched the anime, however, I would suggest you look up the character.

A red unicorn with a chainsaw cutie mark fall's from the sky, and nopony knows where it came from.

Turns out his name is Grell, and he has amnesia. And everypony thinks he's a mare!

What will happen when darkness bubbles around the newcomer? And what love will blossom from this?

WARNING - Will contain gore, and in the future, yaoi/slash/man love/colt cuddling.

Angels? Demons? No, no, those equine creatures are far too colorful, not to mention none of them have chainsaws or lawnmowers. Maybe one of the locals can explain what has happened; nevermind, although it seems a party is in order. How shall the young earl return back to his manor? What manner of sorcery got him here in the first place? Where in the name of tea and scones is Sebastian?!
A Kuroshitsuji(Black Butler) and MLP crossover.
Enjoy~!

HEY! LISTEN!
I kinda need a cover pic for this, preferably featuring Pinkie Pie and Ciel. I'm sorry I have nothing to offer you in return other than credit, about 3/64 of my soul, and all my lavs. A thousand thanks to anypony who answers this call!

Set in an alternate timeline. Fluttershy encounters a strange creature in the woods. After realizing the animal is injured she tries nursing it back to health only to discover she has one of the most dangerous and powerful mages ever to inhabit Equestria in her care.

Story idea is from alarajrogers.

Cover art by the amazing C-Puff who kindly gave me permission to use it.

Winter was the time of the year to drink as much hot chocolate as you please.
But what Discord did not expect to find....
Was a small Fluttershy hiding inside?

Cadence was a very hardcore shipper.
What? Wasn't it obvious?
Being the Princess of Love, it shouldn't be that big of a surprise.
However, as many know, being a hardcore shipper had it's downsides.
Especially when you utter a few words at the wrong time, wrong place, and wrong......
Just wrong EVERYTHING!

(Rated Teen for CURSING, SO MUCH CURSING, and adult humor)

Twilight Sparkle is interrupted from a midnight study session by the arrival of three confused magic students.

A short Harry Potter/My Little Pony crossover. Can the universe handle Twilight Sparkle and Hermione Granger in the same room?

EDIT: Rewritten per 2015-04-27

OHMYGOSH OHMYGOSH OHMYGOSH by Scribble Worthswords

While hanging out with her friends, Sunset Shimmer learns that earth horses apparently can't vomit.

As a magical talking pony, this discovery utterly baffles her.

Proofread by the ever helpful RQK

Canterlot was not the first place Chrysalis attacked, before she moved to Equestria, she picked up a certain creature, a Dragon. His name is Shade, and he suddenly wakes up as a Changeling with only the smallest hints of his past life remaining.
Now thrust into an Invasion, he disregards the orders of his new Queen to save a single filly who he vows to protect. After being launched from the city, Shade must find a way to bring her back, but just how far is he willing to go?
With the secret of Changelings revealed, and Shade’s inexperience, he knows it is only a matter of time, just how long until he is convicted.
(Gore Tag placed for certain sequences that may not be suitable for some)

Now that Earth and Equestria have made contact, lots of ponies dream of visiting Earth, and while tourist visas are hard to come by, a few lucky students each year can participate in a foreign-exchange program.

Silver Glow is one of those lucky ponies.

She thought she was prepared for Earth, but can you ever be fully prepared for a truly foreign exchange?

Link to the dramaturge