The Zone.

Miracle, curse, nopony's land... all these descriptions apply. It is a highly dangerous place, filled with nightmares and deathtraps at every turn, but also with treasures worth a pony's weight in golden bits. This is why there is a constant stream of illegal 'tourists' past the magical barriers.

A young pony enters, inexperienced, but also with a purpose. Will this newcomers resolve be enough to combat the Zone? Let's see.

After the invention of radio, DJ-P0n3 (aka Vinyl Scratch) holds the first Equestrian talk show with her co-host Octavia. Octavia quickly finds out her superior is very eccentric, leading their broadcast to be constantly derailed, yet somehow remain popular. These episodes were recorded for historical significance and transcribed. These are the Vinyl Scratch Tapes.

[Update 1/25/13]: Fully updated to contain all of season 1 and 2, correcting a vast oversight on the part of the author. Sorry it took so long to update it fully on Fimfiction, guys.

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

Truth is the first casualty of war.

The world is in flux; new ideals, groups and technologies permeate every level of society in this age of discovery. The field of augmentation has allowed ponies to improve themselves in ways that were unthinkable a generation ago. Yet, for every benefit, there is an inverse. A griffon civil war rages on the borders, feeding the profits of mercenary companies. Rising populations have forced the rich and poor ever further apart. Harmony is dying.

Mortally wounded after a fatal attack on her laboratory, an earth pony researcher is augmented against her will and sent out into a chaotic world in search of answers. But as her quest unravels this chain of events, she discovers an ancient conspiracy that will shake Equestria to its very core.

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TVTropes Page

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 English teacher Connie Hayden is told by a mysterious new friend that there is a way to travel from the human world to Equestria, she doesn't believe her. But what if the legend of Pinkamena is true?

Illustration by the talented BambooDog.

Snakebite Tourniquet was quite content to work as a healer on a merchants caravan, but then he finds himself alone in the desert with his body changed beyond recognition. He tries to find out why this has happened to him and eventually this leads him back home to the Neigherra Madre Mountains.

This fan-fiction is based on Fallout Equestria by Kkat; a familiarity with the source material may aid your understanding.

Ask Blog: Ask Snakebite Tourniquet

It's springtime in Equestria and Twilight Sparkle and Princess Celestia find themselves out of sorts despite the gorgeous weather. Luna and Rarity both think they know the reason behind their moodiness and set out to make sure that true love blossoms - but will an unfortunate misunderstanding keep the two star-crossed lovers apart forever?

Illustration courtesy of nightmaremoonluna, adapted from a sketch by bri-sta.