SF (canon species only; no humans) Ponies were magically and genetically engineered to be the perfect servitor race. They are powerful, adaptable, intelligent and completely under the control of their creators. A laboratory accident frees one such pony from her mental chains, but how can one mare save herself and the rest of her kind if she doesn't even know she's a slave?
This is not the Equestria you know and these are not your little ponies... not yet, anyway.

Tags: Adventure, Diamond Dogs, Gryphons, NO HUMANS (did I mention that already?)
Other tags: historical, mind control, Clarke's 3rd Law, excessive use of high energy physics, before they were famous.
Detailed review by PaulAsaran.
Cover art by endrome , used with permission.
Russian translation (partial -- 'unofficially' completed in the comments)
A Soot-Covered World, book 1.

Because sometimes, a finale isn't the end. Sometimes, pure evil just means you have more to lose.

A changeling's body is the plaything of her mind - but can a changeling ever really change her stripes?

Also because I've wanted to try something approximating an adventure story for a while. If there's any demand for it, I'll continue it properly, otherwise I'll just wrap it up quickly.

After her complete defeat at the royal wedding, Celestia's ego is shattered. Luna promises to whip her sister back into shape, because it'll take far more than a few laps around the palace to put a grown alicorn at the top of her game. But, with Celestia coming home each day with a new set of bruises and a slightly more forward royal attitude, her subjects begin to fear her more than love her. Is Luna's

special training turning her into a monster, or is it all according to some greater plan? It's time for some tough love!

(Warning: Dark tag for some Celestia abuse.)
(Featured 6/19/2012! :D)

After Chrysalis failed to conquer Equestria, she was shamefully stripped of her title of "Queen of the Changelings".

Their people now leaderless, the Changeling race now finds itself in a unique situation. In the struggle for power, one Changeling seizes the attention of his people. Can he overcome his nature, and the nature of his people, to lead them into a better future?

The now-famous first story of the Lunaverse!

This is the story of Trixie, the Element of Magic and the personal student of Princess Luna. It has been some months since this unicorn moved to Ponyville to learn about the magic of friendship, and, more specifically, how to not let her abrasive personality drive away the friends she does make. So far, she has succeeded, becoming a welcome part of Ponyville life, and as such has decided to put on a magic show for Ponyville during the Eventime festival, the celebration of the spring equinox.

However, a certain purple-coated unicorn seems determined to ruin her fun, and everypony elses'. This unicorn has traveled far to learn as much about magic as she can, and was excited to learn at the hooves of the Element of Magic herself. What she finds in Ponyville, however, leaves this purple-coated unicorn...disappointed. She resolves to take drastic steps to show Trixie what real magic is all about!

...this could end poorly.

Now has A TVTropes Page!

I'm Griffin, not much else to it. I've been bullied most of my life, which left me bitter and sarcastic. I'm a closet brony. What? You think I'm just gonna go out and tell a world that hates me that I watch a cartoon intended for little girls? I don't feel like giving the punks at school any more ammo. That's when cosmic powers decide I need to take a trip to my favorite fantasy land. But all is not sunshine and rainbows and it certainly won't be after I'm done with it. Equestria from the point of view of an extremely pissed off teenager, with a twist. Rust, the author of 'The Ballad of Echo the Diamond dog' is awesomesauce enough to have a cross over between our stories. Carnelian is a boss when it comes to art. Part of the 'Chess Game of the Gods'.

Violence, gratuitous swearing, and sexual themes. Reader discretion is advised.

After the Changeling's failed attack, a full-out crusade is set against them. Many find a way to simply slip away. One is hapless enough to fall into the hooves of those his kind fought against. The changeling is promptly sent to the only pony Celestia could trust with such a thing.

Completely revamped, and thanks for constructive criticism and support behind the scenes (you know who you are, people).

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Pulled into a strange world where myth and legends are real. Unable to communicate to the native creatures here, or even able to move for that matter... How is a human supposed to adapt to this strange world, or even manage to keep his sanity when he is encased in stone.

I always wanted to go to Equestria. When I got the chance, I took the deal without reading the fine print. To my surprise, I didn't arrive there as a pony, or even as a human. It seems I get to view this world from a different perspective than what I've imagined.

My name is Echo. I am a Diamond Dog.

-Edited by the one, the only, Nathan Traveler!
-(Cover by Jovial_Shake of fimfiction.net)
-Now featured on Equestriadaily.com!