Having failed to reach Davy Jones' Locker with the rest of his crew, Captain Hector Barbossa finds himself stranded within a hell many times more terrifying; a land infested with magical talking horses and little baby dragons. Despite the odds being stacked against him and the inhabitants of Ponyville at his back every step of the way, he vows to return to his own world and finish the quest he started.

If only fate did not have a new adventure in store for him. An adventure that could very well change the fate of Equestria and the Caribbean seas forever...

Jonathan Lockhart feels closer to his fellow fans than his friends and family. He knows magic isn't real, and there's no way he can journey into that fictional world, though that doesn't stop him from wishing. But then, much to his surprise, he falls through a portal. The outcome is not at all what he imagined.

With the help of some new friends, John has to figure out what happened, why it happened, and most importantly, how he can get home.

Set during Season Two.

This is it. Twilight has set aside a whole day for fun, fun, fun, and her newest instruction book is going to show her exactly how to do it.

Lyra just can't wait to share her new thoughts and ideas with her best friend, Bon-Bon.

Applejack is no stranger to death, but when Applebloom contracts a terminal disease, she will do anything, even walk in the valley of the shadow of death, in order to say goodbye.

The residents of Ponyville are unaccustomed to violence, but recent attacks are shaking up the normally peaceful town. On top of this, Twilight Sparkle has been experiencing short bouts of memory loss and is getting concerned with her own health. The truth in the situation may be harder to bear, however.

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Sparkler has a happy life with her adoptive mother and sister. However, a secret weighs heavy on her. Seeking some advice and relief, she comes knocking at Cheerilee's door.

What does the filly want to confess?

Many thanks to Taggerung for the amazing picture! The original can be found here: http://ballman64.deviantart.com/#/d4k8s3q

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

Twilight Sparkle wakes up one morning to a harsh dose of unreality. She is stranded, without her friends, on an island which matches no known locale on Equestria. Surrounded and harried on all sides by the alien and the dangerous, she will find her mettle sorely tested, and find perhaps that the best friends you will ever have in your life are the ones you make when your back is to the wall...

Thanks to CedricBale and noobie56xx for tracking down the name of the artist so I could give them credit.