Blank Slate is the greatest thief of his generation. He has robbed countless nigh-impossible marks, and his talents as a master of disguise are beyond par - truly, nopony knows who he is.

And now he's preparing the greatest heist in mortal memory: the treasure vaults of the Princesses themselves.

But you have to get up pretty early in the morning to get one past the pony who defines when ‘early in the morning’ is…

Spoilers in the comments! Beware! Beware...

Audio Reading available - thank you ABagOVicodin
Czech Translation available - Thank you Keranis

While experimenting, Twilight's new teleportation spell goes awry, sending her careening into a different world, just in time to take part in a fantastic ritual called Heaven's Feel. Twilight must adapt to the world of humans and take part in the vicious conflict that is the 4th Holy Grail War as a Servant alongside her equally reluctant Master. The duo must contend with powerful adversaries and survive the subtle machinations of the Magi determined to win the Grail at any cost. Can Twilight overcome her unwillingness to take the lives of others? More importantly, should she? And is there any way for the displaced Unicorn to return home? Trapped, alone and in a different world and surrounded by enemies on all sides, does the Magic of Friendship still hold any hope for Twilight?

A crossover with Fate/Zero.

Princess Celestia tires of constantly being surrounded by decorum, deference, and formality, and decides to take a day off from being Princess. But visiting Ponyville incognito is harder than she expects. Will she be able to fit in and make friends without blowing her cover?

Edit: Now a collaborative effort with Loyal2Luna

Commander Shepard has been through a lot, but now that the Reaper War's over he can finally relax and take a little R&R, right? Soak up the sun, grab a few drinks, spend some quality time with Tali, introduce a new race to the galaxy... wait, what?

In the aftermath of the war, a new species has been discovered amidst the destruction and fire. A species that have access to powers never seen before, powers which could prove vital to the continuation of galactic survival.

The Citadel Council has elected to send Shepard, along with the rest of the crew of the Normandy, to introduce Equestria to the universe outside of their solar system.

Now Shepard must wade through obstructive bureaucrats, antagonistic journalists, and the odd, angry prince in order to bring Equestria into a new age of space and adventure.

So settle in, it's going to be one hell of a vacation!

Now has it's own TvTropes page

What if instead of a chest, The tree of harmony gave Twilight a book with strange writing and a heart shaped gem on the cover. After reading a mysterious rhyme: "When the time is right. Underneath the same light. A bond will ignite. At very first sight." The Mane Six, and Spike, are all magically sucked in and they travel to a world with no ponies or magic, but humans and...bending! People who can control the four elements of nature. With no way to get back home, they stumble upon a new friend: Avatar Korra, a fiery but big hearted young girl with an extraordinary destiny. Upon first glance, the Ponies all feel an instant connection with the young girl, who might also be the key to them returning to Equestria and uncovering the secrets of the book, while at the same time help Korra to defeat an evil masked man named Amon who vows to rid the world of bending with his mysterious and terrifying powers.

Now the ponies will need to adjust to their new environment: a whole new world where people seem to loose sight of friendship almost too easily, but Twilight sees that there is hope, as they show Korra the ways of Equestria and with that, the ponies and avatar start to change their world for the better, by helping everyone see that Friendship is exactly the kind of magic that this world truly needs.

Featuring new parody songs of all of your pony favorites. Experience a whole new side to the Legend and a whole new side to the Magic!

Read the one shot story “Cutie Troubles” staring Mako and the Cutie Mark Crusaders, and “Tales of Equestria”, a retelling of season 4 of MLP
https://www.fanfiction.net/s/10264379/1/Cutie-Troubles
https://www.fanfiction.net/s/11140115/1/The-Little-Pony-Legend-Tales-of-Equestria

As Celestia's personal student, there was no doubt in Sunset Shimmer's mind that she was the most powerful Unicorn in Equestria. There was no spell she couldn't master, no lesson she couldn't learn...save for one.

Hoping to rectify the situation, Princess Celestia broke one of her own rules and unearthed Starswirl's Mirror, hoping that, by gazing into it, Sunset would see what she always wanted. Unfortunately, the plan worked a little TOO well, but not in the manner she hoped.

Cast out and believing herself betrayed by Celestia, a desperate Sunset decides to seek out her 'Hearts Desire' on the other side of the Mirror...to a place where she will learn the lessons Celestia so desperately wished for her to learn: that Friendship is Magic.