When the Cutie Mark Crusaders dig up an ancient magical artifact, they unleash a spell on the town that allows everypony to see a "lie meter" floating above each other's heads. While attempting to solve the mystery, Twilight Sparkle has to analyze the tenuous balance between friendship and honesty. She doesn't like what she finds.

Based on a story idea conceived by theworstwriter
Written and posted with his permission

Princess Celestia always knew that Twilight Sparkle was destined for great things, but she never revealed the source of that knowledge, not even to those closest to her. When the day of Twilight's true destiny finally arrives, can Celestia fulfill an ancient promise to save Equestia's past, present, and future, even it means saying goodbye to Twilight forever? How can Celestia refuse her mother's last wish?

Art by the inimitable Harwick

This story is a sequel to Scion of Chaos

After returning to Ponyville from Canterlot, Sweetie Belle tries her best to find her place amongst friends and family and to remember what it feels like to be home.

This story takes place 4 days after the finale of Scion of Chaos. (I recommend reading that first, if you haven't already)
And set 5 years later is the sequel story: A Heart of Change

Thanks to Rameslack for his amazing cover art.

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

Love doesn't always last forever. And sometimes it can crumble so spectacularly that you never want to see or speak to the other person again.

Celestia was perfectly content with that. But when Twilight Sparkle suddenly appears at the palace in Canterlot, after a century of silence, she has no choice but to talk to her.

Politely, of course. Always politely.

*Credit and many thanks go to littlerobotbird for the concept and editing of the cover art. As near as I can tell, the original picture is Jykinturah's work, but the source post seems to be gone.*

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

Sweetie Belle is compelled to learn magic after Rarity promises to teach her the finer art of dressmaking, but only once the young filly has learned the basics of magic. However, learning magic comes with its own set of complications and bears an unforeseen gift that will change Sweetie Belle's life forever.

Here's a one-shot sequel that takes place four days after Scion of Chaos: An Emerald Treasure

And this is a Multi-chapter sequel that takes place 5 years after the events of SoC and AET: A Heart of Change

Here's a poem that's based around the character Red Timber. (Not necessary to read for the comprehension of the storyline): Red Timber

Special thanks to SameAsUsual for letting me use his art: http://sameasusual.deviantart.com/art/Ultimate-Sweetie-Belle-340226445. And to ShadowBro for adding in the title and cropping the image.

Bon Bon reflects on her companionship with Lyra.

Octavia Philharmonica is a desperate mare. Her involvement in the ill-fated "pony pokey" at the prestigious Grand Galloping Gala has left her blacklisted among the elite of Canterlot who form her clientele. Faced with the possibility of being evicted from her apartment for inability to pay rent she decides to take a temporary job at a local nightclub. Of course, she's never set hoof in a club before and has no idea what she's getting involved in . . .

After a misunderstanding leads to a vicious fight at Flight Camp that leaves them both in the hospital, Cloud Kicker wanted absolutely nothing to do with Rainbow Dash. However, Rainbow refuses to let a single incident destroy their friendship, and has been writing Cloud Kicker letters ever since that horrible day. For more than two years Cloud Kicker has been throwing the letter into the trash unopened, but what will happen when she finally reads one? Can their friendship possibly be salvaged?

Side-story to "The Life and Times of a Winning Pony"