There's a human in Equestria? Nopony can tell, because humans turn into ponies upon arrival. But for this human, the change is massive, and one that could scar her for life if she isn't properly prepared...

A series of events explaining the life and trials of a human child lost in a strange and unfamiliar world, and how she finally connects with her new home.

Teen for mild injuries

Her death had been catastrophic. Deadened iron in her core, sapping her strength, then the incomprehensibly painful collapse into her own body. But that was in the past, and Cygnus X-1 had grown content with her life as a black hole.

But then, she fell to a strange planet in a stranger body. Not knowing how to eat, drink, or communicate, Cygnus X-1 would have met her end if it were not for meeting an organic who took mercy on her. But now that she had returned to life, Cygnus X-1 found her embers sparking, and within her new powers is the way for her to return...

... and if anyone tried to stop her from going home? She was going to kill them.

Anon likes his life to be simple. He wakes up, goes to work and sometimes gets himself a good book to read while he is home. It's a routine that he likes to follow, it makes him feel like he has a bit of normality with his life in Equestria. The fact that having Celestia come crashing into his home as part of his routine should prove that his life is anything but normal.

(Thanks to PeerImagination for editing!)

Wake up. Go to work. Save Ponyville from unimaginable horrors beyond time and space. Have lunch with your PFF.

Ditzy Doo lives in a different world than her fellow ponies. She sees things nopony else can see—like higher-dimensional spatial anomalies, fae creatures, and eldritch abominations. And she uses what she sees to solve problems that nopony else even knows about.

But this time, Ditzy may have bitten off more than she can chew. Something very unfriendly is trying to enter Equestria through Ponyville’s Town Hall. An earth pony with an hourglass cutie mark has taken an unhelpful interest in Ditzy. The Princess’s personal student has grown suspicious. And, most irritating of all, her alarm clock radio is acting strangely.

Ditzy must race against the clock to save Ponyville—a clock that keeps playing the same song over, and over, and over ...

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Traducción al español por SPANIARD KIWI aquí.
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Many thanks to everyone who preread and edited my WORDS WORDS WORDS:

Japanese Teeth
Sessalisk
Sereg
Kuroi Tsubasa Tenshi
CDRW
Clever Pun
Connelly
Justanotherbrony

Cover art assembled by yours truly, using a Derpy vector by Sierraex.

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Shoop boopy boop boop doop bedoop.

Equestria is still picking up the pieces after the defeat of Tirek, and everypony is helping out with the paperwork, even Rainbow Dash. Things change when Princess Celestia arrives, bringing with her a letter with some very stunning accusations of the exploits of a resident in the town of Oasis. Now, the main six are tasked with finding out if the letter was truth or fiction. Did this Mister Baker really do what they claim? Only one way to find out.

However, Mister Baker is not who, or what they expected.

Rated Teen for occasional language. Additional tags added for more dark themes.

Proof read and edited by the amazing SunnyPack , Snakeskin Ducktape, and Tyrannosaurus Tux.

After a tragic accident, a human ends up in Lord Tirek's body, as part of an attempt to reform the villain after his recent escapades. While the hero of our tale is trying to make sense of his new surroundings, the rest of Equestria thinks that the most terrible threat that their world has ever seen is back...
And the powers that be are definitely not happy about it.
New Cover Art By Shadow Bolt

The plan, he thought, was perfect. Instead of returning to the mortal world as a shade of his former self, King Sombra would transmute his soul into the body of his greatest foe, using her influence and power to destroy Equestria from the inside and take vengeance on the Princesses that stole his beloved empire.

There's just one problem: after her fight with Tirek, Twilight Sparkle changed her address. This turns out to be a much bigger problem than Sombra thought. A Dinky-Doo-sized problem, to be precise.

5th-place finalist in the More Most Dangerous Game contest.

Cover art crudely Photoshopped by me from this and this. I am art and so can you.

Reading by Neighrator Pony

A machine made for war awakes in a new world. Stuck in surroundings which puzzle it; can it, or will it be able to become something more than what it is?

Crossover with Keith Laumers Bolo-verse
Other tags include : Slice of Life, Possible Romance believe it or not! And a bit of humor.
Please beware of any spoilers in comments as well

In the magical land of Equestria, two alicorn sisters raise the Sun and the Moon every day to give the world a night and day cycle, basic for the survival of life. There are also two alicorns who rule over two very core aspects of life and harmony itself. Those are Love and Friendship. While not as ancient as the two sisters, all princesses are essential to the world's balance.
This balance is also sustained by the hard-working ponies, who make the seasons change and manage the weather to fit their needs, so everypony has enough food and water, and every animal is also attended to assure that any of them are caught in the changes of seasons.

But what about the planet itself? What about Mother Nature?
This is the question that Gaia asks when she arrives to this foreign world. After so much work her son persuaded her to take a long vacation in Equestria, saying that she needed one and assuring her that he would be in charge now, and she must take a break. But what can a several billion-year old alicorn possibly do to pass her time in this land?

(SimEarth/MLP Crossover)
(Timelife of Gaia's life 'till the start of the story)

(This story is sci-fi, and somewhat different to regular FIM stories.)
Aneki's world was small. It was spherical, and it only took a day to gallop from one side to the other. She had been taught nothing existed outside the sphere, but she wasn't so sure about that. Perhaps her world was a bottle, a container in which ponies had fled to live. A time would come when she gained the opportunity to investigate these things first hoof, if she lived that long.