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

Delphine Thibodeaux--Tib to her friends, if she had any--is a member of a privileged working class. Yet her life is empty and joyless, and her future is as immutable as it is bleak.

Then Equestria makes contact with her dying world, and Tib has the opportunity to change her life in ways she never imagined. But the price of a new future can be very high.

Nona is a bright young woman who is limited in her ability to interact with those around her. She's seen as feebleminded or crazy, but she is neither. Only her father can see her potential...but even he can't seem to find the key to unlock the cage that holds her truest self. It takes the greatest act of courage for Nona to reach out and find her own way to a new world--one where she can become who she really is.

Everyone who walks into a Conversion Bureau clinic has different reasons for wanting to go pony. Some want a new life. Some want to escape the dying Earth.

Ana just wants to dance. An ability, a calling, that was forever taken away from her.

Bitter, in pain, and alone, she wants no one's help. No compassion. No friendship. No love.

Is she ever going to the wrong place.

Conversion can heal her battered body. Can it mend her shattered heart?

Trev has lived all his young life within the Sikh community, sheltered from the harsher realities of the dying world, with the hope of a more joyful existence hereafter. But now decades of projected survival for humanity have become a handful of years, and there is only one way to escape extinction. How can Trev embrace a new life without estranging his devoted family?

Park Eun-sook has lost everything dear to her. Her home, her family, the life she'd always wanted. Now she is embittered, alone, and far too old to start again.

She's also too damn stubborn to die.

The road to Equestria is not always an easy one. There are obstacles, deterrents, strangers determined to stop anyone who dares choose Conversion. There are even those who would rather see you dead.

Park Eun-sook has always loved a challenge. But her greatest challenge may be to her deepest resolve, one she made when she lost everything.

Love no one.

Los Pegasus is the new name of what was once Los Angeles. The Equestrian barrier, now on land, approaches, and with it Inclusion Day, where the city will become part of Equestria. Both converted Newfoals and the last humans all have their own stories to tell as this final event in the life of their city approaches.

"I can't believe I overlooked something as simple as feathers. It's no wonder you were having trouble. I wish I had more 'dragonish' knowledge to give you..."

Those words will have far reaching consequences when Twilight took those words to heart and contacted the one dragon that she thought could help: Dragon Lord Ember. Whom she sends will shake the very foundations of history and magic.

New cover as of 9/22/23
Also how the hey did this get featured? (9/18/22)

A dragon prince, awakened...
A Princess, in love...
A plot to overthrow the Equestrian diarchy and break the very foundations of equine society...
And an embittered Sorcerer willing to go to any lengths to realize his vision for the future...

Ranma Saotome doesn't care about ANY of that. He's on the wrong world, in the wrong body, and fate seems as determined as ever to drive the world's mightiest martial artist to an early grave. As schemes come unraveled and dark magic tears Equestria apart, all he really wants is to figure out what happened to Japan and keep himself fed.
But, alas, he always seems to be in the wrong place at the right time...

(Ranma 0.5/MLP crossover; not an Age of Iron Story)
(Cover art by EZTP)

"Equestria's Guard: the Bravest and the Best. Do you have what it takes?"

So the advertisements say. When Rainbow Dash saves the life of Princess Luna, however, she quickly comes to learn that there's a lot more to the guard than what everypony knows. As she faces down threats to her friends, her Princesses, and her country, Rainbow will have to decide exactly who she is loyal to.

A Price of Loyalty story.