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

A spell gone wrong, Twilight, Celestia and Luna have no answer how to get back home to the Equestria that they know.
Instead, they're stuck in a place where things are similar, yet so different.
They're stuck in what Equestria could have been.
And all they have is a book and their memories to help them.
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Proofread by WickedlyTragic and Fuzzman

This is my first attempt at a full on chaptered story. So whether it turns out bad or good we'll have to wait and see.
EDIT 15/8/14: This got featured? Holy Celestia and Luna...
EDIT 2 29/10/14: Got on the Popular Stories... hnnng

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.

This story is a sequel to Project: Sunflower

After the events of Project: Sunflower, Erin Olsen has returned to Ponyville, happy to pursue her studies in magic. After everything that happened the year before, she's looking forward to spending her days studying and having fun with her friends.

Meanwhile, on the newly discovered world of Harmony, humans and ponies work together to study this strange new world. However, their arrival causes something ancient to begin stirring. Something that may end up changing everything.

Erin will need all of her courage, all of her cleverness and, of course, all of her friends to see herself through what happens next.

Cover art by Valkyrie-Girl
Editing provided by:
Brilliant Point, Coandco, Ekevoo, Ludicrous Lycan, Merlos the Mad and Razalon the Lizardman.

Hi, my name is Markus.

I thought it was going to be a normal Sunday morning. Boy, was I wrong. Not even out of my bed I discover that I am now Rainbow Dash... and I'm still on Earth. In wake of my sudden change, I try to handle the situation with my knowledge gained from the fandom, my inner brony writer helping me along the way. However, as I soon find out, I'm not the only one with this problem...

Just a self-insert thing I started to get rid of a bout of writer's block. I don't care if it's liked or hated, so enjoy. Please remember, criticism is greatly appreciated, as is praise.

EDIT: For other stories in this universe, PonyEarthverse

Cloud Kicker might just have the wildest life of any pony in Equestria. Marvel at the insanity that is her life, and laugh at the suffering of her poor beleaguered best friend, Blossomforth. And maybe, just maybe, there's more to her than just the lovable sex maniac everypony thinks she is.

This is a semi-sequel to "The Incredibly Dense Mind of Rainbow Dash." Not really a proper sequel, since it's focused on Cloud Kicker and Blossomforth instead of Rainbow and Pinkie, but it's in the same continuity. So I guess that makes it a follow-up-side-quel story. Or something. You don't need to have read "The Incredibly Dense Mind of Rainbow Dash" to read or enjoy this, but you ought to read it anyway, just because.

TvTropes Page

The central story of the Winningverse.

We got a tag for Cloud Kicker, but Blossomforth still deserves one too.

(Set in Psycho's Equestria)
This is a side-story to The true Psychopath. The image was made by HooveslikeJagger. The "other" tag is for the OCs from other people.
You can find the characters that are "cameos" here. I won't say which ones are which, so you'll have to look here. That, or the original creators can say it themselves in the comments.

The Psychopath returns once more with a certain mare with equally swirling eyes to cause Illogic and unfortunate destruction. However, this time, the Disirvians have brought in somepony that he knows. A very sinister pony from his past with similar powers. Only, this dark one is probably one of the most violent creatures out there, and probably, just probably, when both the World of Illogic and the World of Insanity encounter, something will be unleashed to leach off the results and make some unexpected allies.

However, what exactly IS the reason for these shady characters at the tough, unforgiving Disirvian mountains, to go so far out of their way to capture Psycho? What purpose is there? Perhaps Pandora will be able to shed some light on this mystery.

The Doctor has had a good, long run through time and space with Ditzy Doo. But it is that time again for him to regenerate bodies. But this time, it seems... different...
What would happen if The Doctor regenerated... as a mare?

Jake is given the opportunity of a lifetime when the technology to bring him to Equestria arises. He will be chosen at random to become one of the ponies in a virtual representation of Ponyville. Will everything go as planned? Or is there something deeper to it all?

A different take on a HiE fic, these humans will become ponies from the show.

Rated T for adult humor/references.

It's April Foal's Day and Applejack is, as usual, the recipient of many pranks, much to the amusement of her brother. When she enlists Twilight Sparkle to help with her revenge things get a little out of hoof.