This story is a sequel to Days of Wasp and Spider

Believed dead by their creators, the ponies that will become Celestia and Luna have broken their mental conditioning and escaped into the wilderness. Here they plan the revolution that will free all ponykind, knowing that it is only a matter of time before their ruse is discovered.

Back in their underground arcologies, the ponies' erstwhile masters deal with the consequences of the escape, all the while unaware that something lurking at the bottom of space-time wants them all dead.

A Soot-Covered World, book 2.
Canon species only/no humans.
This story has nothing to do with the Holocaust.
Art by InLucidReverie, used with permission.

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.

This story is a sequel to Back and There Again

Rarity has 'landed' safely in Equestria and she can finally see all her friends and family again. Aiden can finally meet all these good people he's heard so much about, and maybe try his hand at a bit of amateur diplomacy.

Unfortunately, they weren't the only ones to find a way to travel to Equus...

Events fifteen hundred years in the making will come to fruition as old enemies and allies vie to decide the fate of two worlds.

This story takes place before the events of Season 8.
Extra tags (since five character tags are the limit): Tempest Shadow, Changelings

This 'Earth' is so close, and yet so far from anything Twilight described on the other side of that mirror. How is Rarity going to get back to her home when she can't understand anyponybody? And didn't Twilight say she became human, and humans didn't use magic? Yet clearly some did... and that wasn't even counting all the devices that might as well have been magical, as far as Rarity was concerned.

Who knew one strange little gem could cause so many problems? They'd taken it from her after it'd brought her straight into a lab for study, but... If she ever found it again, she was definitely going to let Spike eat it. As soon as she got home. And by Celestia, she was going to get home!

...Will Rarity ever find her way home? Is the gem that brought her to Earth the key, and is there more to the factions maneuvering around her appearance?

To complicate matters, this is an Earth recovering from its first alien invasion (Rarity being technically the second, then). ...Or does that actually explain things? No, no it doesn't. But it will.

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To go with the Teen rating (or rather to explain it) there is light profanity and violence. I don't believe either are at a level where the warning tags are needed, but I'll mention it at least.
There may be some darker, more explicit moments in flashbacks, but I'll save those for Interludes.

This story is a sequel to Necromancy For Foals

Twilight Sparkle and Rainbow Dash find themselves drawn by the call of the cutie map to a jungle in the middle of nowhere. Drawn further by the knowledge of an ancient temple, they are confronted with icy cold and a sense of dread.

A Necromancer was sealed away in this temple a thousand years ago.

Now, he is waking up...

((Sequel to Necromancy for Foals. Artwork by The-Minuscule-Task on Tumblr.))

The Elements of Harmony didn't work. Nightmare Moon won. Her beautiful night has been unending for over two years now, and her reign over Equestria is total.

Twilight and Pinkie Pie never gave up, even after everyone else did.

An infinity of praise be to Harwick for the cover art.

Sometimes I start things and don't finish them. Probably because I'm a terrible person. As a result, my Google Drive is full of half-finished ponyfics.

This story is a collection of those fics.

“What is this 'important issue' that requires my attention this early in the day?”
She made no effort to hide the annoyance in her voice, glaring at the other alicorns as they finally acknowledged her presence.
“Ah, Princess Luna, it's uh...”
Twilight looked up from the scroll, an ephemeral smile flashing on her face before giving way to a look of concern just before she glanced at Celestia for support.
“What Twilight is trying to say is that an unknown creature appeared in Canterlot while you were asleep, sister.”

This is a story about what happens after a lone human appears in Canterlot, seen through the eyes of Twilight and Luna. The three princesses seek to understand their extraterrestrial visitor, each in their own way. Celestia tasks Twilight to find out as much as she can while Luna seeks to sate her own curiosity. Can Twilight figure out the newcomer's motive? Can Luna find out why the alien reminds her of herself? Can any of them find out what language he speaks?

Time after time, through chaos and through wars, Princess Celestia prevailed.

Of all the terrible forces she could have fallen to, Flim Flam Industry was the last one anypony had expected.

With thanks to gardrek for editing (3-6) and PinkieDP, Ice Star, and Odd_Sarge for prereading help.

The Great Freeze. Was it our hubris in controlling the sun, or was it that others started to covet that control? At this point, the whos and the whys don’t change anything. Our star is dying, and those responsible for it are long dead. Their causes and motives, lost to all but a few.

For the past hundred years, our sun has been growing dimmer, kept alive only by Celestia’s constant efforts. But not even she nor the legion of magi and scientists can stop the inevitable.

Our only choice is to flee to a new world, one that could give our doomed species a second chance. The Seeding colony ship is that chance. There are so many worth saving, and yet so very few seats.

May our children never forget the sacrifice of those we leave behind.

~Excerpt from Princess Twilight Sparkle’s journal three days before Seeding.

While this fic will borrow heavily from Beyond Earth, it will be written so that you do not have to know anything about BE to enjoy the story.