Darrilon has proudly served Princess Celestia for many years, and risen to the rank of Captain of the elite squad known as the Solarian Patrol. But every day is a new challenge when your superior officer (and divine ruler) has no respect for protocol or procedure.

Practice makes perfect. And Princess Twilight wants everything to be perfect. Especially the end of the world.

"How could somepony as amazing as you not have a Special Somepony on Hearts and Hooves Day?"

With that single sentence, a thousand memories came flooding back to Cheerilee. A thousand memories of a thousand terrible dates...

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.

When a fantasy world’s story ends in fire, the gods of the humans sacrifice everything to send the last remnant of their charges to a new world, beyond the reach of their powerful enemies.

The humans who had lost everything are now given a new world to explore, but will the hazards of the Everfree prove too much for them? And how exactly will the Equestrians react to their new neighbors?

Will the humans adapt to their new gods, or will they die out twice?

This is my first fic, I wanted to try something I haven't seen before.
I can't improve without criticism. Feel free to point stuff out.

This story is a sequel to Celestia Sleeps In

After the accidental discovery of humans, Celestia tasked Lyra with learning about Dale's culture and Dale's language. Two meetings later, a misunderstanding caused Dale and a Coast Guard woman to be inadvertently transported to Equestria. With the two humans hospitalized and communication limited at best, the Equestrians just want to heal them, while back on earth the Coast Guard wants nothing more than to determine what happened to one of their sailors.

This story is a sequel to Kind Hearts & Coronets

“My name’s Daisy Jo Martinez. I was born – or so my birth certificate says – on March 30, 2012. I’m married with two kids, my husband’s a Naval officer. I’m originally from a town just outside of DC called Winchester, Virginia – apple capital of America, yay, go me. I’m a Republican – that tends to shock a lot of people – and I’m a practicing Catholic – and that tends to shock more people than the first, and like I said, I’m married – I think people start passing out at that point. I've lived a happy, charmed life and I’m proud to be an American.

“And as you can also see, I’m a pony. Well, physically anyway."

The first main story of The All-American Girl Saga.
TV Tropes page
Selected as "Humans Aren't Bastards" Group's Mods' Choice July 2013

Sometimes, bad things happen to good ponies. Sometimes, a good pony has to do bad things. Sometimes, some of these things involve the undead. A collection of short stories from the silence of Equestria's eternal night.

In a yard, all alone, a pony whiles away the time caring for the lawn and the roses. Roseluck can understand that, to a point. And she's determined to help.

First-place winner in the /fic/ write-off "Lost in Translation."

Featured on Equestria Daily!

And now featured by the Royal Canterlot Library!

Reading by obabscribbler, Present Perfect, Goombasa, and Reverb Brony.

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony