Stop me if you heard this one: I have been sent to Ponyville on a personal quest. Now I'm stuck in a town with a cowgirl with a manly-sounding name, A crazy cat lady with variety, a damsel who wants to make me look fabulous, an egomaniac (who could be gay... it's the hair), and a mare so hyped up I swear she was on something.

No, I'm not Twilight Sparkle, but it is HER friends. I don't have any. That's why I'm stuck here. My name is Woundsalt.

Uber thanks to Carnival for this magnificent creation of a cover.

And do you really need a warning that there are spoilers in the comments? I expected more from you.

FANGROUP!
PATREON!
FEATURED SINCE 30/08/14 AND PRETTY MUCH DOING IT SINCE!

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

A not so standard human-in-Equestria story including but not limited to: democracy, tequila, and robots.

Things escalate from there.

TV Tropes page

Now translated into Korean