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 Families

Third in the Nuptialverse...

Twilight Sparkle has done much for Equestria. If it weren't for her, Equestria would be destroyed three times over by now.

So what happens when she has to leave? What happens when she and Spike are forced to depart from Equestria in order to fulfill their duties? And what happens when there's still important things at home to do?

Applejack, Rarity, Pinkie Pie, Fluttershy, and Rainbow Dash now have to get along without the one who leads them. All of Equestria is counting on them. Can they do it?

AU only post-season 2, since the basic idea for this fic was created long before it aired. Events similar to season 3 have happened, all of which will be revealed. Strongly recommended you read Post Nuptials and Families first.

Cover art by Concier

[ Inspired off Season 5 Finale - Nightmare Moon Verse ]
Social reject, blank flank, and failed candidate for Celestia's School for Gifted Unicorns, Twilight Sparkle's life couldn't get anymore depressing even if she tried. Yet still she looks to the other things in her life to get by, such as her job selling donuts at Joe's Bakery, her best friend Smarty Pants, as well as her inspiration to someday be as great as The Great and Powerful Trixie herself! Life isn't as bad as it may seem, and she enjoys the simplicity of her daily routine, the peace of her recluse world. That is until suddenly she is targeted by the current ruling body of Equestria, Nightmare Moon herself!? Perhaps she spoke too soon. Better run Twilight, destiny is calling!

Be Awed and Amazed by the tale of Sweetie Belle as she traverses the multiverse in search of her lost mentor and friend, Twilight Sparkle! Will she find her in post-apocalyptic Equestria? Or maybe in a strange world where everypony is the wrong gender? Or even where a Pony claims to be a human? Read as she journeys through very familiar worlds you might have read about... if you dare!

At this point in time all the main worlds to be visited have already been chosen. Thank you all for the suggestions, and I hope you enjoy the surprises!

Here's the official TSC:F Music Intro: The Sweetie Chronicles: Fragments

WDTP: S2/3-CE
You can also visit the TV Tropes Page which has spoilers!

A continuation of “Jake and the Kid”
Warning.
You really need to read that story first.

Goose Down wanted to be a Guard Pony more than anything else in her life, just like her Father, numerous uncles, and six big brothers. Unfortunately she was small, a Nocturne Mare, and, oh yes, had a phobic fear of the open sky.

Combined that with her mistake of getting in the wrong job application line at the palace and ending up a maid, things look very dim indeed in regards to realizing her dream.

On the plus side, she works for the Princess of Dreams. So maybe, with a little help from her friends, and a very different type of princess, she will manage to achieve her heart’s desire.

With a few minor modifications.

Proofed and contributed to by Georg, who also graciously allowed me to steal some of his better characters. Georg really needs a co-writer credit on this. He contributes so much during his pre-reading that the stories simply would not be the same without him.

Be sure to catch his Nocturne stories, especially Diplomacy by Other Means.

Freaks.

Thats what everyone calls us. Freaks or monsters just because we have animal ears and a tail. Me and my cousin just want to live a peaceful life without the government hunting us down for their experiments. My cousin, she's just eight years old and I thirteen. We have lived with our 'deformities' since we were born. The doctors couldn't figure out how either of us got the ears or tail. It was later on in my life that I figured out I had telekinesis and other powers, and that just made the government want us even more after finding out. They wanted to turn us into weapons but I grabbed Nate and ran away before they could.

One day we were backed into an alleyway and corned. With nowhere to run I was about to give up, but that was before a tear in space opened behind us. Now I did the smartest thing you could do in this situation, I used my powers on the soldiers before grabbing a few of their weapons, one of their trucks and my cousin before going in. What lied on the other side we were not prepared for.

A/N: This story takes place in a universe where mlp never existed. This will be set in a YHaY universe and the story will take place roughly close to two years before Nightmare Moon returns.. Also the chapters may be uploaded slowly due to school, but I will try me hardest to get them out to you.

Original story belongs to Madmaxtheblack, and MLP is owned by Hasbro.

This story is a sequel to Parallels

The alliance between Equestria and Alemaneia continues to hold steadfast; Colonel Paul Werner and Generalfeldmarschall Aryanne Land's 'relationship' is at an all-time high... though that does not say much.

Things turn unprecedented, however, when Alemaneia becomes the victim. Actions against the state would never sit lightly with Aryanne, and she vows to unleash the entire military might of her nation against the offending foreign government... even at the threat of multi-state intervention in a to-be conflict. The world pleads with Equestria to rein in the fascist nation or risk a global conflict, and Paul is tasked with talking Aryanne's justified response down.

However, she'll only talk to him on one condition:

He must come to Alemaneia.

All the while, Paul must grapple with some of his biggest demons.

-Reading of 'Parallels' is not explicitly required, though highly encouraged if you want the surrounding details and lead-up.
-Awesome base Aryanne art done by Antamoanimisan-m, sourced to derpibooru. (Their tumblr is NSFW)

This story is a sequel to The Symbiote

Warning: The following description may contain spoilers for The Symbiote! If you have not yet read that and do not wish to be spoiled, please go no further.

After the events of The Symbiote, Twilight is no longer the only pony in Equestria to be host to one of the alien symbiotes captured by the Life Aura Center. Most of her friends have also agreed to host the aliens, understanding that they are unable to survive on their planet alone. This is a compilation of everyone's experiences with their respective partners! Chapters probably won't necessarily be in chronological order but I will include references to how long it's been since everyone became bonded. Most of these will take place shortly after The Symbiote and through the beginning parts of The Parasite.

Note, symbiotes will likely not have the exact same personalities and abilities as their Marvel comics counterparts! I draw largely from Sony's Venom movie along with information researched from the Marvel wiki, but otherwise my interpretations of the characters are my own. That being said I am more than happy to hear about what YOU like about each of these symbiotes and I may incorporate what I learn into future chapters. Oh and Rainbow and Pinkie's symbiotes, Slasher and Hysteria respectively, are my own OCs.

I will update with warnings and tags as I write. The rating on this may go up as well. We'll see.

Spike/Lasher - A Game of O&O contains mild fantasy violence and swearing.
Applejack/Phage - Healing and Repairs contains some swearing. No other warnings.

Like my content? Buy Me a Coffee!

This story is a sequel to Stardust

Times are changing for Equestria as Twilight’s return brings with it news of people and cultures from beyond the peaceful world everypony knows. Aid and volunteers are freely offered to help the besieged humans of Earth because every Equestrian knows that’s what good friends do. Unfortunately, making friends can also have the unintended consequence of making enemies.

When the monsters besieging the humans strike at Equestria with a level of brutality not seen in over a thousand years, the cry for help is sent to all the kingdoms of the world. Honored allies step forth to fulfill ancient treaties and oaths. Enemies, old and new, bury their grievances. An alliance never before seen in Equestria will be created to combat the monsters from the void.

And because of these events, a grim but welcome sibling to the XCOM project is born.

(XCOM/FiM Crossover)
(Sequel to Stardust, which I recommend reading before starting this. Fortitude Amicitia and Broken aren't required reading but are supplemental to the storyline)
(Gore tag for blood and violence)
(Alternate Universe tag because of the divergence from canon that Stardust has caused)
(Uses elements of Season 4)
(Coverart produced by the amazing Carnelian!)
(Many thanks to Arzoo, BradTheBrony, Vandenbz and Setokaiva for prereading!)
(As of 03/07/2016, the prereading team consists of Arzoo, BradTheBrony, Noble Cause and Metallusionsismagic!)
(Complete with it's own TVTropes page as part of the Stardust continuity. Could use some updating!)
(Character tags will be added as chapters are added!)
(Featured 5/12/2014! Thanks folks!)
(Possible spoilers in the comments! BEWARE!)

My attempt at a more serious 'Luna meets Neil Armstrong' storyline. What would really happen, both on the moon and on Earth? Inspired by 'The Eagle has Landed' by CyanBlackStone.

Princess Luna has found herself on a very different moon after some strange force interfered with her banishment. She doesn't know what the metal objects that keep orbiting and sometimes landing there are, but she wants to find out. Meanwhile, Neil Armstrong believes that being the first man on the moon will be the crowning achievement of his life. Hoo boy, is he ever in for a surprise.

For those who are interested, the most excellent Zanec has provided this link to an interactive Apollo 11 site.