The Shaper is a smith of unparalleled skill, her creations the most sought after in the fallen world. When a pony named Lyra comes to her with a unique commission she has to put all her skill to the test to craft a weapon of great power. For Lyra's goal is not an easy one, and it is not just any weapon that can kill a Dragon.

A story inspired by this and this image, as well as this challenge by CDRW (whose fic A Still More Glorious Dawn Awaits is quite good).

After the Changeling invasion, Celestia and Luna make the decision to have Twilight investigate the Elements of Harmony and solve the mystery of their power.

A thousand years later, Rainbow Dash awakens in a world she does not recognize. She has no idea how or why she came to be there. She does not know the language, the geography or any of the rules of this new time. She soon finds allies in Star Fall, a scholarly pegasus whose Talent is Magic, and Astrid, Star Fall's Griffin guardian. Together they set out to discover why Dash has been sent to the future, and how she might return to when she belongs.

War threatens the nations, a Nightmare stalks the shadows, and Rainbow Dash's arrival has turned her into a wild card in a deadly game that pits the law on both sides of a broken Equestria against a mysterious criminal figure, Max Cash. Yet the stakes are higher than anyone knows, for in her research Twilight Sparkle discovered a dark secret about the Elements, something that will shake the foundations of the world.

Cover image by SierraEx
Has a TvTropes page

The sequel to Role Reversal.

It's been several weeks since Smarty Pants began her life at Sweet Apple Acres. Even after the night she shared with Big Mac, he hasn't realised her true intentions. Seemingly, his definition of 'friend' is very different to her own. When Smarty catches wind of an upcoming competition, she hatches a plan in the hopes of finally making Big Mac understand her feelings. What can possibly go wrong?

Pre-read by the, oh, so lovely RainbowBob, and edited by the omniscient Fluttrick!

Sometimes, we all need company. Big Mac found his in the form of a doll — a filly's mere toy. She provided companionship as an inanimate object, but now, it's not enough. Big Mac attempts to find a way to transform her into something more capable of understanding, but when he does, will he be able to make the ultimate sacrifice to see it through?

Rarity, Rainbow Dash, Applejack, Pinkie Pie, and Fluttershy were brought together by Twilight Sparkle and the magic of friendship and have had incredible experiences. But now they are trapped in a world they don't understand-Equestria. How will these five normal human girls deal with such dangers as dragons, minotaurs, parasprites, -and perhaps the most dangerous of them all,- themselves?

Art Source: http://demoncat8.deviantart.com/art/Eqg-In-Equestria-Cover-392108298

NON CANON with Season 4 and EQG 2.

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)

After fighting off the alien fleet that menaced Earth, XCOM turns their focus to warning other worlds of the possible threat. When Doctor Moira Vahlen is accidentally sent to one of those worlds, she learns that the the invaders have attacked Equestria. Who will protect them from the horrors they're about to face?

Sorry, I should clarify that last bit. Who will protect the aliens from what they've just gotten themselves into?

Commander Shepard remembers firing the crucible. She remembers she had to make an important choice. She remembers good friends, a lover, and plenty of loyal crewmen.

She just can't remember what her choice was. What the threat she was striving so hard to end was. Or what the faces of the most important people in her life look like.

She also has no idea how she wound up in the monster filled forest she's come to call home for the past eight months. Or how she picked up a snarky A.I. making its home in her omni-tool.

The sequel to League of Discord. Twilight Sparkle and her friends have successfully returned the six champions to Runeterra, but find themselves dragged along with them. They must now find a way home, despite having no help from an apathetic League, and having yet another pair of ambitious and sinister eyes watching their every move.

After a summoning mishap, six champions from Runeterra's League of Legends arrive in Equestria. At first, they are focused entirely on getting home, but soon find out that it might be more complicated than they thought when Discord decides that he can use them for his own ends. Continued in The Redemption of Jericho Swain