The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

I was living a comfortable life. Had a loving wife and son, money was absolutely no issue, everything was swell.

Next thing I know, I'm hearing voices, I can't move, I can't talk, I can't even breathe. Yet, I know I'm alive, though I don't entirely feel like myself anymore.

Then I end up being the last of survivor of my new race.

I'm not even human anymore...

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-A HiE fic as a changeling in an alternate universe where MLP was never aired on Earth.
-Starts shortly before the end of Season 2.
***Slow updates! You've been warned!***
-Current cover image is a placeholder. Trying to find a more appropriate one...
-Comments below contain spoilers!
-The [Tragedy] tag is there mainly because I can't put up the [Sad] tag, due to conflicts with the [Comedy] tag.

Megan Williams had no big goals in life. Just to take over the family farm from her father. Then one day, her entire life is thrown into chaos when she finds herself transported to another world, full of magic and mythical creatures. A world where her very presence could threaten the precarious power balance that has existed for a millenia, for once there, she finds herself caught up in a political game of cat and mouse that threatens to plunge the world into war.

G1 MLP / G4 MLP Crossover

Special Thanks to Kevin Lee and Page-Mistress for their fantastic job of editing and proof reading.

Spin-off by Natomon01: Here

You know these stories where somebody suddenly wakes up with a creepy, unknown voice in their head? Well that's what's happening to me, except I'm that strange voice, and I'm not stuck in somebody, I'm stuck in somePONY.
How did I get here? And how will I ever find a way to go back without so much as a body to call my own?

Now with 100% more cover art thanks to the splendiferously awesome Exelzior! Go read his stuff instead of mine! Do it!

Rated teen for foul-mouthed protagonist. Expect bad words.

Crossover of BioShock and My Little Pony.

Huge thanks to Dubstep_Teaparty and Sexy Pudgy Pinkie Pie for editing

Scootaloo is an orphan, she has been trying to hide it ever since she escaped the orphanage. After being bullied by Diamond Tiara again Scootaloo whishes she had a big dad to protect her. She is about to get more than she bargained for when the universe decides to bend over backwards for her.

Alpha 9-2 was having a fairly normal day in Rapture until his little sister discovered a strange syringe of Adam. It turns out that one must never inject themselves with a syringe of unstable Adam. No matter how rainbow colored and pretty they are. Now he has found himself in a strange new body in a strange new land and with a strange new little sister.

Holy shit featured 12/5/14 thanks so much!
Asdfghjkl this is getting featured every time I update!

Huge thanks to Shadow Bolt for providing the cover image.

When a six year old human boy is transported to Equestria by accident, he will need a home. Everyone needs shelter, protection and love to live a happy life, but who could love a predator from another world? Luckily for young Chris, somepony steps up to the plate.

Cover art by akumamattata Deviant Art
Re-imagined by Hunterhd1
Edited by Dream Seeker
Read by Leonexus Random

The ever-helpful Twilight Sparkle sets out to design a compound to help increase brain activity in those who have a willingness to learn, but have trouble grasping difficult concepts. After acquiring a test subject in Rainbow Dash, the results are indisputable! Rainbow grasps new ideas and theories faster and more completely than ever before! But, how smart is too smart?

An accident in the lab sends our favorite boy genius to Equestria, as a pony. What will he do and how will he get back? The answer: Science! (Cover Art Updated!)
New FAQ! and TV Tropes!
Planned Phrases from Dexter:
“Pinkie Pie! Don’t push that Button!” /to Pinkie
“Please, Magic is the word simpletons and the ignorant use to describe what they cannot understand.”/ to Twilight
“No, I didn't strap a rocket to you. I strapped you to a rocket.” /to Rainbow Dash
“Friends? Who needs friends?”

Dexter is a boy super-genius with a disdain for anything girlish and no desire for friendship. After an mishap in his lab, he gets stuck in Equestria. How will he cope with the over-friendly ponies, and the girlish everything?
For any who do not know Dexter's Lab: http://en.wikipedia.org/wiki/Dexter's_Laboratory
[RIP Christine Cavanaugh: 8/16/63-12/22/2014] - Dexter's Original Voice Actress

This story is a sequel to Project: Sunflower

After the events of Project: Sunflower, Erin Olsen has returned to Ponyville, happy to pursue her studies in magic. After everything that happened the year before, she's looking forward to spending her days studying and having fun with her friends.

Meanwhile, on the newly discovered world of Harmony, humans and ponies work together to study this strange new world. However, their arrival causes something ancient to begin stirring. Something that may end up changing everything.

Erin will need all of her courage, all of her cleverness and, of course, all of her friends to see herself through what happens next.

Cover art by Valkyrie-Girl
Editing provided by:
Brilliant Point, Coandco, Ekevoo, Ludicrous Lycan, Merlos the Mad and Razalon the Lizardman.

Rarity's exploits in "Sweet and Elite" set in motion a chain of events that will find the unicorn dressmaker taking part in the greatest airship race in the world, the Alicorn's Cup. Excitement will give way to terror, as Rarity soon finds herself the victim of a plot against Equestria, and shipwrecked far from home with her least favorite stallion, the boorish Prince Blueblood. Rarity will learn of treachery in Canterlot and abroad, and will have search for something of substance beneath the prince's obnoxious veneer as she struggles to not only save herself, but her entire nation.

Part One of Three
The Adamant Triskelion - Book One: The Flight of the Alicorn
The Adamant Triskelion - Book Two: The Abyssal Forge
The Adamant Triskelion - Book Three: ???