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

One fine morning, Spike woke up early and ran some errands. Then he found Discord putting up a seller's stand, apparently ready to open his own business. One which offers a one-day transformation into anything the user wants. And he apparently had the patience to set up his shop LEGALLY. Twilight and the others brace themselves for the inevitable...

(Content of future chapters controlled by user votes!) (Now with Tropes!)

Now with a 'dramatic' reading: Prologue

Current poll: The transformation is chosen already (Tatzlpony!) You pick who becomes the Tatzlpony! (Voting ends 6/25 at 5PM EST)
Previous poll: The Cutie Mark Crusaders (63 votes out of 390) and Age Manipulation (83 votes out of 392) won
Previous poll: Sunset Shimmer (transformation error won with 83 votes out of 325)
Previous poll: Princess Celestia (85 votes out of 397) and Seapony/Siren (104 votes out of 421) won
Previous poll: Trixie (86 votes out of 357) and Alicorn (90 votes out of 338) won
Previous poll: Fancy Pants and Fleur Dis Lee (genderswap won with 199 votes out of 381)
Previous poll: Princess Luna (zebra won with 85 votes out of 368)
Previous poll: Rainbow Dash (griffon won with 274 votes out of 596!!!)
Previous poll: Rarity (diamond dog won with 184 votes out of 444!!!)
Previous poll: Starlight Glimmer (changeling royal (Chrysalis-type) won with 74 votes out of 257)
Previous poll: Pinkie Pie (alicorn won with 80 votes out 282)
Previous poll: Spike (unicorn won with 60 votes out of 225)
Previous poll: Applejack (minotaur won with 56 votes out of 254)
Previous poll: Fluttershy (draconequus won with 75 votes out of 181)

(Voting closes after a week from the posting of the current chapter)

A modern mage teleports himself to Equestria in a magical mishap, where he somehow saves the world tries to continue to live his life. Meanwhile, in Canterlot, a dismissed engineer makes plans to exact her revenge on the pony that stole her teacher from her. But how far down does the engineer's rabbit hole go?

The sequel to this story: Sweetie Belle and the Quest for Knowledge is now available!

When Sweetie Belle finds a mysterious artifact of a now lost civilization, how will she come to terms with the wealth of knowledge it provides? It says it can be ignored, it says it will never try to influence her, but can an artifact of such power really be so harmless?

Book I of III

Prologue and Chapter 1: Thanks to TheOtherSideOfFluttershy for pre-reading and editing.
The whole story: Thanks to RaylanKrios for editing.
Chapter 4: Thanks to AuthorGenesis for editing.
Epilogue:
Thanks to Malefactory for editing.

Inexperience is a foreign concept to Celestia. At least she thinks it is. Right up until the moment a rash decision leaves her with a student who is a dozen years younger than what she's used to.

Enjoy.

Twilight Sparkle has spent months researching chaos magic, developing a new spell to unlock magic nopony has ever experienced before. But when something goes wrong with casting, Twilight finds herself turned into a Draconequus and unable to control her new chaos magic. If she ever wants to be a pony again, there is only one who can help her learn to control her new magic.

Of course, learning from Discord was never going to be simple. And after a while, being a draconequus doesn't seem so bad anyway....

Based on the concept by Lopoddity

Editing by DB_Explorer
Proofreading by Mac349 (Ch. 1-11), Trippy998, Just A Fabulous Cat (Ch. 1-5), Doctor Candor and skysthelimit (Ch. 1-11).

Yes, there is a crossover tag, but read down to see why it's there.

Alexander Laythem is a master engineer who lives in isolation with his AI assistant, Rose. Unforeseen events result in these scientists and engineers traversing the boundaries of reality to a world that was supposed to be fictional, forever losing their place in the human world. With the help of some of the friendlier of the native inhabitants, Alex and Rose plan to rebuild and pick up their research where it left off. But as more knowledge is gained and technologies are developed, an ancient power with an insatiable hunger for control awakens, hell bent on bending reality to its whims with the single goal of creating and maintaining the perfect society. Takes place largely during season 2.

Rated teen because of the occasional use of "strong language." Also, if you're going to favorite it, please go ahead and leave a like as well! I truly appreciate each and every one!

I've added the dark and gore tags as of chapter 39: Full Force Forward. Should be worth noting that I will downplay the gore as much as humanly possible. It's not the focus of anything, but it's there. Most of the technological aspects are referenced from the Unreal franchise, hence the crossover tag. Keep in mind, however, that crossed-over elements from the games largely take a back seat and only serve as inspiration and setting. I'm focusing on the plot itself to make it as good as I possibly can, and I'm always going over it to fix little things here and there.

Special thanks to amazing Rocinante for pre-reading and editing!

*First featured on 7/29/14!*

This story is a sequel to Culling of the Hives

It's been twelve years since Twilight awakened as a changeling. With Phoenix Roost's focus on economic and population growth, the hive has grown strong.

The rest of the changeling hives have been ravaged by war for years with Twilight's brood remaining aloof. Sphinx psyker immigrants have dispersed throughout not only Equestria but as far as the Griffin and Minotaur nations, eager for a new life away from the paranoia of their homeland.

Yet for all of Twilight's desire for leave the rest of the queens to their wars, the Home Guard's proclamation will force Twilight to return to the jungle of her rebirth.

Real cover art pending.

As always, big thanks to Boldish42 and A Bitter Pill for editing.

Magic is bleeding out of Equestria and into another realm, a realm where magic does not exist. Twilight must stop the flow of magic before disaster strikes. Can the natives of this realm be of help? How do sapient beings function without magic anyway? What's this about a cartoon?

Takes place shortly after season four.

Octavia has received an invitation to attend the Magna Anima Nocte, a celebration of the Night through music—a tradition lost for a thousand years, now born again after the defeat of Nightmare Moon and the return of Princess Luna.

But there, under the light of the stars, darkness churns and awaits, and while the rewards seem promising, maybe there is something to the words a certain gypsy told her. Octavia will have to match wits with other competitors, fight for her right to win and unravel the enigma of Winter Charm, the mysterious patron behind the event.