After an unknown accident Twilight Sparkle and Rainbow Dash awake to find themselves sharing the same body! Now they must struggle to hold themselves together as their world is turned upside down. How long can two ponies exist in a single mind? It’s a race against time as they search for answers before it’s too late. When all is said and done, you’ll never look at Twilight Dash the same way again.

Just about everypony in Ponyville knows Scootaloo. She's your normal, carefree pegasus foal who crusades for her cutie mark, zips around town on her scooter, and looks up to her idol Rainbow Dash. But what if that's not all there is to her? Scootaloo worries that her friends will find out that she's not the foal they know and love, or that she's not even a foal at all. But, when her secret does come out, their reactions might surprise her.

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.

Applejack had long since taken the Hearth’s Warming Eve story for fact. When she and Fluttershy find themselves in an untamed wilderness, they’ll learn that not all history is preserved. In their struggle to find their way home, the two will unearth secrets unknown to any living being, pony or otherwise.

Half a world away, the others have problems of their own. As Rainbow Dash struggles to discover exactly what she is to her oldest friend, Twilight must face the stunning truth about her long-time mentor.

In the end, what is lost, and what is found?

A letter from Celestia interrupts one of Pinkie's parties with disturbing news. Now friendships will be pushed to the limit as Twilight struggles to uncover which of her friends is not who, or even what, she appears to be.

(While not a romance, this does contain a shipped pair)

in Russian

A communication scholar from Canterlot, a mailmare from Fillydelphia, and a zebra diplomat in training, brought together by a hunger for knowledge, embark on a journey of discovery to the mysterious homeland of the dragons.

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

Lock On, one of Princess Celestia's trustworthy and steadfast Royal Guards, has a secret that he can no longer keep. The moment he saw Chrysalis, Queen of the Changelings, he had fallen in love with her. Strongly determined to confess his love, he ventures beyond the known Equestrian border, stepping onto the rocky wasteland that few ponies have ever set hoof on before—and even fewer have returned.

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Thanks StarslashBrony (now StarPlasma) and Sunshine-Smiles for the editing job!

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.

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?