Distance can drive us apart. It can also bring us closer together.

After all is said and done, and the ponies have gone their separate ways, the only way they have to keep in touch is through letters.

Original Equestria Daily post is here
Russian translation
Chinese translation
Polish translation
Spanish translation

Now with music and audiobook

Mood Wings - Observations on Pegasus Body Language.

When Twilight Sparkle finds this book, she discovers an entirely new field of research. The secrets of pegasus wings lie before her, and she insists on making her own observations on the matter.

How?

Field research, of course.

This story is a sequel to Petriculture

It's been several months since Pinkie Pie made a stunning admission about her past that permanently changed her relationship with her friends, particularly Twilight Sparkle, but life seems to have settled back to normal (well, normal by Pinkie Pie's standards, at least). However, when an old nemesis returns and ensnares Twilight in her influence, it's up to Pinkie to make things right.

This is the second story in The Petriculture Cycle. There is a TV Tropes Page for the entire Cycle here.

Cover image by Page Turner; "Princess Twilight" vector by Nianara.

Big Macintosh had a perfectly good reason for taking Twilight's doll; he wanted to use it to finally start a conversation with her. But Applejack's having none of it, Rarity's getting the wrong idea about everything, and the Cutie Mark Crusader Matchmakers are about to really throw a spanner in the works! A comedy of errors launching a full fleet of ships.

Dimly it occurs to her, somewhere through the haze of magic and the relentless onslaught of images, that the spell has both gone very right and gone very, very wrong. A TwiPie story.

She never expected to see a golden chariot flying over Ponyville. She never expected just how much her life would change. She never expected Twilight Sparkle … and Twilight Sparkle most certainly never expected Pinkie Pie.

Twilight Sparkle decides to share the magic of s'mores and slumber parties with all five of her friends . However, no night can be perfect as Twilight quickly becomes disturbed at the language displayed by her friends. Can she keep her mouth shut, or will she bite off more than she can chew?

Super-secret super-entry for THE LEAGUE OF EXTRAORDINARY GENTLECOLTS.

Chrysalis, the last Queen of the changelings, is dying. With her death, her children will die, and the changelings will cease. She has one final plan, a coup to save her race, her children. She must make a new Queen, one strong enough, and smart enough, to save her people. It will be her legacy, and her greatest achievement. Too bad she never asked Twilight if she wanted to help

Dark tag added just to be safe, but its a "light dark" if that even exists.
Edited by: Nadake

Rarity and Fluttershy have been friends for years, and every week they go to the spa. But after every trip, Rarity finds herself growing greener with envy over Fluttershy's beauty and grace, if not something more than just envy— and what might happen if she finds out Fluttershy feels the same way about her?
Rated Teen for moments of sensuality, foreplay, and sexual themes. Reader discretion is advised.
Assistance by Karrakaz, Blue_Paladin42, TheGreatEater, Setokaiva, Squinty Mudmane, Aurora, Starfall, and Ariamaki.
Cover Image by Megasweet, used with permission.
Image colored by Explosivegent.
Additional graphical design by Novel-Idea.
TV Tropes page can be found here, credited to Winter Lily.

AU. Based on the first season. Twilight and Celestia begin to drift apart due to a misunderstanding. Will Luna speak up and repair the breach, or will she remain silent to keep her new friend, Twilight, all to herself? What other challenges will face everypony involved because of this new relationship?

It's a simple little love story. Unfortunately, love's not simple.