When balefire and death rained from the skies, many took sanctuary in the giant underground shelters known as Stables. However, those who could not make it to one of the many Stables set sail for the Summer Sunset Islands. They hoped that the tourist hot spot would be spared the devastation. These refugees soon faced a sheer wall of violent weather, known today as The Storm Wall, sealed them away from the rest of the world. The refugees were forced to live their lives on the high seas of Oceania.

Two hundred years later, a tribal seapony has a chance encounter that would change life in Oceania forever.

Rarity's family name is in shambles, and her fortune is nonexistent. To return what her father squandered, she and her good friend Pinkie Pie turn to piracy, commandeering a magical airship and kidnapping the princess's personal student.

When Princess Celestia learns of Twilight and Applejack's abduction, she doesn't agree to pay the ransom. No, she hires the sky's greatest tactical mind, the Daring Swordspony Rainbow Dash, and her sidekick, Fluttershy. As the two groups engage in a game of cat and mouse, more dangerous threats hang on the horizon. Aztec Curses, angry gods, and a mysterious figure known only as the Derp Pirate Roberts.

Will the six Elements of Harmony be able to gather the seven pieces of eight, or will the world fall to utter chaos, and rise up as an empire of anarchy and piracy?

Now with its own TV Tropes page thanks to Cleverpun: TV Tropes

This story is a sequel to The Flight of the Alicorn

Rarity was certain her troubles with magical gemstones had ended, but an unexpected royal visit soon convinces her otherwise. In order to save an ailing Princess, stop an ancient menace, and avert a disaster that threatens the survival of a lost tribe of ponies, Rarity, Blueblood, and a brave group of friends will travel to strange and foreign lands, and into the fathomless depths beneath tormented seas. In her quest to uncover the secrets of the Abyssal Forge, Rarity will have to use all her charm, wit, and skill—and rely on allies old and new—as the unlikeliest of ponies once again attempts to save the world in style.

Part Two of Three
The Adamant Triskelion - Book One: The Flight of the Alicorn
The Adamant Triskelion - Book Two: The Abyssal Forge
The Adamant Triskelion - Book Three: ???

Beautiful cover art by Lucky Dreams.

Inspired by the heroics of the mysterious mare known as the Stable Dweller, Silver Storm, a guard of the town of Marefort, decides to go on a daring mission to rescue her captured brother. Of course things rarely go as planned and her attempts at heroism drags her into a tangled web of plots and conspiracies as warring factions vie for control over the last great city: Dise.

Spanish Version translated by Spaniard-Kiwi: https://www.deviantart.com/spaniard-kiwi/art/Fallout-Ecuestria-Heroes-996263393

This story is a sequel to Of Solicitude

Ten years after a massive war, Equestria has changed. The Empire now rules over all, giving peace and prosperity to those that deserve it, but some are against this new rulership.
The CMC, a small, raggedy group of smugglers working for the Apple family, are caught red-hoofed by an Imperial patrol. As the friends fight for their lives, they learn about themselves, each other, and the world they now reside in.
Meanwhile, in Canterlot, Emperor Blueblood has amassed a massive fleet and is preparing to smash what is left of the rebellion under the oppressive hoof of his Empire.

Fantart:

http://www.youtube.com/watch?v=cSqZZHhQa_I

http://www.youtube.com/watch?v=JE7m2dk8FB4&list=UUS5YHp6kB61DHIXt8THr4iQ&index=1&feature=plcp

Celestia wants Twilight and her friends to loosen up a little bit around her. Luna just wants to try the hard cider. During a surprise visit to Sweet Apple Acres at the tail end of cider season, Princess Luna has just a bit too much to drink, and when she makes a rather inappropriate joke, Twilight comes to the very uncomfortable realization that she has never seen Celestia excuse herself to use the restroom.