An early story of mine.

Luna awakes during a trip to ponyville to find a parade outside her window. Curious, she asks her sister what they're celebrating. She and Celestia go to the royal library to go over the history of April Foals Day, and why laughter is dear to all.

When the powerful and mighty Discord is defeated by the Six Elements of Harmony, the ponies of Equestria thought that his second incarceration meant the end to his chaos. However, his final hurrah has not yet been given. For the Element of Chaos does not believe in leaving the party without one last, great prank.

Now, as Twilight Sparkle faces dreams in darkness, and portents of doom and gloom arise, the Elements of Harmony as well as everypony else in Equestria must prepare for the biggest problem they've yet faced. No mere princess to be freed from the influence of darkness, or the imprisonment of the embodiment of Chaos, this is bigger than anything before.

For as events unfold, a race long thought mystical and legendary on Equestria is coming back...from another world. As the greatest minds and leaders of the Edwardian age are confronted with the fact that humans are not alone in the universe, Twilight and friends must deal with a world so very different from their own. Where magic is merely the application of sufficiently advanced science, and where Friendship and Harmony are sorely lacking.

Now the history of Earth and Equestria are forever altered as the forces of harmony and friendship explore a world of industrialization and war, where both sides have some things to share, for better and worse....

When Lyra Proposes to Bon-Bon, Pinkie's zealous promotion of the noble wedding of the century attracts some unexpected and unwanted attention. Can Pinkie and her party ponies pull off the biggest wedding Ponyville's ever seen to give the two most deserving ponies a happily ever after?

On a return from a frustratingly dull mission, Captain James Tiberius Kirk and his crew stumble across Equestria, but soon discover a Klingon plot to devastate the entire planet, and eventually, conquer the Fedaration. Join Captain Kirk and his crew in:

Star Trek VII: The Equestrian Frontier

This story is a sequel to In the Eye of the Storm

A half-remembered dream leads Twilight Sparkle to test a new "window" spell by looking at an alternate Equestria. What she sees there will lead her and her friend Princess Luna into adventures they had never imagined possible. A season one fic.
As featured on Equestria Daily.

This is technically a sequel to In the Eye of the Storm as it's using the same versions of Twilight and Luna, but you can absolutely read this story without having read that first.

I began writing this story during season 1. I've updated some things to reflect canon changes in season 2, however at that point I decided that having to constantly go back and change things every time something new happened on the show just wasn't going to work, so the story ignores most of season 2, and everything from season 3 onward.

This story owes much of its quality to Jordanis, who is practically the co-author at this point.

Something is gathering around the bearers of the Elements of Harmony. Something dangerous. Something magical. There's only one pony with the knowledge, the skills, and the muffins needed to save Equestria as we know it.
A Friendship is Magic: the Gathering crossover, taking place between seasons 1 and 2. Here there be flashbacks, briefly seen OC's, and possibly every emotion known to man or tiny horse. Abandon all pretenses of not being a nerd, ye who enter here.

As the heroic Autobots and the evil Decepticons wage their war on cybertron, an expedition for a new source of energy brings them to an unknown world. Can the Autobots harvest this new energy of "magic" in time? Or will the Decepticons learn of its secrets and use it to conquer the galaxy!?

A sleepover at Twilight's library goes horribly awry when the ponies find themselves the characters in a ghost story instead of the narrators. What is behind the door?

(Contains spoilers of MEGAMAN ZERO, MEGAMAN X.)
After nearly being killed by Dr. Wily. Zero learns a few simple truths about himself that put his entire life into perspective. As his rage fades, he finds himself exhausted from the constant war he has had to wage to survive. After surviving the explosion of ragnarock and the landing on is home world. He seeks a different form of releif. With the help of Cyber elves X, Elplizo and the four guardians, Zero finally finds a world with no technology. A land called Equestria

(First few chapters detail Zero's arrival on Equestria. The story will center around him, and will feature random members of the pony society. as a result I'm gonna leave the Cast list fairly blank for the moment.)
TITLE PICTURE badly put together by me. (LOLZ)
Zero artwork taken from google. MLP cast pic thing by Crunch Nugget
http://fav.me/d4m4teq [link to pic] ^_^ its simple but it works. Will have a second title image later on, but that on would be spoilerish if used now.
Oh yes, Megaman, Megaman Zero, and all other Megaman related References are thanks to Capcom for making the utterly awesome game.
[thanks to the 'how to write cross overs post thing that reminded me about that, I apologize for how long it took me to credit those I owe much to.]

This one is a story that I've wanted to do ever since I saw the episode "Cutie Mark Chronicles." Than I saw that I wasn't the only one with the idea. But, I decided to do this one anyway.

Everyone knows that Rainbow Dash was the reason the mane six got their cutie marks. Or is it? When Rainbow decides against a race against Fluttershy's bullies, everything you thought you knew about Equestria is thrown out the window.

By the way, it would be really awesome if ponies started doing fanart of how they interpret these alternate ponies. If you've done any, send them to me at a.tempus [at] derpymail.org