How would a being like Discord want to be remembered after he's gone? Well, if you're curious, he did actually write a will. To the surprise of nobody, its contents are bizarre and mildly disturbing.

Part of the Borderworld.

Now with audio readings by NDLMongoose and MelancholyIguana.

After reading a book by Spitfire's personal trainer, Rainbow Dash decides that the best way to get closer to her ultimate goal of joining the Wonderbolts is to add strength training to her practices by having one of her friends ride her. However, when she decides that Twilight Sparkle is just the mare for the job, the pegasus gets a bit more than she bargained for.

Artwork by Piggybank12. Used with permission. Thanks to DPV111 for assisting me with story planning.

Princess Celestia writes a letter to her favorite student, highlighting the need for proper lab safety.

Apologies to Tired Old Man. Not connected in any way to his body of work-- I just went with the pun.

Twilight Sparkle wakes up in the middle of the street, in an awkward position, with a killer hangover. It's mid-morning, but the sun hasn't risen. Ponyville looks like a disaster area.

Just what in the name of Celestia happened at Pinkie Pie's "It's a New
Year to Cheer!" party?

Written for the Writer's Group December 2013 contest.

While Tirek is brooding in confinement, Celestia sends him an unexpected visitor.

Hey look, some person did a reading of it.

Pinkie Pie challenges her friends to play a game in which they take turns being evil, with the rest of the players tasked to thwart the evil schemes. The stakes are high, and all of Ponyville is caught in the middle...

Twilight's caught a special type of flu, and it's up to none other than Princess Celestia to nurse her through it. A special, tender little moment follows in this most unexpected of circumstances.

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169

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).

There is a very good reason that Princess Celestia sends Twilight and her friends to do her dirty work.

There is a very good reason that immortal, impossibly strong alicorns have a fleet of guards.

The newest Princess of Equestria needs to learn what strength really means to an alicorn.