Ravnica. City of guilds. Sprawling ecumenopolis. The lovechild of Ankh-Morpork and Coruscant. If Dominaria is the heart of the Multiverse, then Ravnica is its liver, a place with a thousand purposes, none of them particularly appetizing.

The plane is already home to humans, goblins, vedalken, elves, merfolk, and more besides. Who's to say ponies weren't there the whole time? The ponies certainly aren't. Versatile as humans, colorful as rainbows, and innocent as any other Ravnican, they've found their way into each and every guild. But even when the guilds would separate them into distinct factions, the magic of friendship connects them. This is the story of those connections and how they encircle Ravnica as much as any magical path across the plane.

(Confused? Curious? Check out the Planeswalker's Guide to Ravnica and Ravnican Race Relations for further details.)

The sun is big and beautiful and bright. It warms you up, and it makes you smile. But the sun can also exhaust you. And if you stare directly into the sun, if you get all caught up in its beauty and forget to look away, it can blind you.

Pinkie Pie is Fluttershy’s sun.

Ponies these days are nuzzling younger than ever. Talk to your foals about the dangers of unprotected tummy rubs.

A Los Pegasus charity commission for Pav Feira. He... he gave me the prompt. I had no choice. Forgive me.

Rainbow Dash isn't afraid of anything, and she has better things to do than sit around worrying about some wussy emotions. But after reading the next Daring Do novel, she suddenly finds her feelings towards her friends changing- and not in ways she's comfortable with...

(May be subject to massive edits, depending on whether I can get over the obligatory irrational[?] hatred. Also, yes, I select the cover images pretty much at random.)

Somepony struggles to remember their childhood. But something's wrong. The facts aren't lining up, and things are becoming blurred. What's at the bottom of this mystery?

After finding her assistant missing again during her court duties, Twilight finds Spike with none other then Fluttershy and learns that the two have been a couple for a while. After overcoming her shock, she is told the story of how the two, unexpectedly, found comfort in each others embrace...

When Rarity’s friends discover that she has been seeing an escort, they decide to investigate and find out why. What they discover is more shocking than any of them could have imagined.

An alternate and significantly better version of this story can be found here.

When Rarity’s friends discover that she has been secretly meeting with an escort, they begin investigating, and soon discover a web of lies and unrequited romances none of them ever could have expected.

A reimagining of Rarity's Mare of the Evening.

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

Applejack and Rainbow Dash knew this would be hard, but a long distance relationship was in their future from the start. A Wonderbolt and an apple farmer don't have a lot of time in the same place, so they do their best with letters and the occasional weekends. But when Applejack finds out that Rainbow Dash is on the cover of Flyers Illustrated: Wet Feathers Edition, it plays on a fear she never mentioned to Dash: Everypony knows that famous ponies are different from normal folks. . .

Right?

"Wet Mane Rainbow Dash," used in the cover image, is by Suikuzu.
Prereading by DbzOrDie, First_Down, Tchernobog, and Jackie