'John Smith' has settled in Ponyville with his wife and two daughters for many peaceful years. When the TARDIS gets a temporal distress call, Doctor Whooves and his family find themselves lost in time. Now Derpy must contend with not only monsters and maniacs, but the future and past versions of her husband!

Based on the lazy Hasbro recolour of Twilight Sparkle. One dark and stormy night, Twilight Sparkle is visited by a strange pony. But this pony knows a lot about Twilight Sparkle; in fact, she might just be Twilight's number one fan. And that couldn't be a bad thing, right?

A day in the life, and a glimpse into the mind, of Ponyville's favorite mail carrier and single mom. But if she had the choice of any one day for everyone to read about, it probably wouldn't be this one...

Metal Gear has fallen into the hooves of an Equestrian revolutionary, who, with the backing of his human mercenary allies, intends to use it to depose Celestia and crown himself ruler. Having crossed into Equestria in pursuit of this rogue weapon, the legendary Solid Snake must ally with the residents of Ponyville to prevent a nuclear catastrophe.

See also Equestria Gear Solid, the hilarious spin-off EQG parody in which everything you know is wrong, and every single character from the story is an awful caricature of themselves.

Now with its own TVtropes page!

Applejack finds a strange visitor in her apple orchard one day, with even stranger stories to tell...
MLP/L4D2 crossover. My first story on FiMfiction.net! May add more tags as story progresses.
Credit for the image goes to brokencreation on DeviantArt.

In an alternate reality, Discord found his love of chaos came in handy for babysitting young foals. For two thousand years, since he and the princess' were kids, he's babysat nearly everyone in Equestria. Now he's babysitting the cutie mark crusaders, and while he does he recounts with them his many babysitting jobs of your favorite characters as fillies, one by one.

There is a sequel, and a threequel to this...

For the longest time, peace settled in New York City. Young Peter Parker, otherwise known as the Amazing Spider-Man, got a long, relaxing break. No goblins, no rhinos, no lizards. But this will all change, as it always does for Spider-Man. He must save the day again, but this time, things have changed. Dr. Octopus has created a universal traveling vortex, that can teleport any being to a new dimension. Spider-Man must seek the help of Madam Web to grab hold of the new land he has fallen to: Equestria.
Adventure, and Action will pursue.

...My name is Alex Mercer. I'm the reason for all of this. They call me a killer, a monster, a terrorist... I'm all of these things. Three weeks ago someone released a lethal virus in Penn Station. I woke up at the morgue. Now I hunt, I kill, I consume, I become. I'm gonna find out who did this to me... And I'm gonna make them pay.

Part 1: Lyra's Pyro Predicament
Part 2: Twilight's Demoman Devastation
Part 3: King Sombra's Robotic Retaliation

When a mishap causes two para-dimensional weapons to colide with one another, RED Team's Pyro is sent flying from the Team Fortress 2 universe into the alternate universe of My Little Pony, where he is almost instantly discovered by Lyra, who shelters him in her home.

Having him hidden in her small townhouse isn't easy; keeping him from setting things on fire, teaching him that not every cart that passes by is cause for alarm, and that blue ponies are not something to be suspicious of.

However, with Nightmare Night soon approaching, Princess Luna feels that there may be something more sinister riding on the coat tails of Pyro's grand entrance; the first human to ever set foot in Equestria some thousand years ago...

Princess Celestia is due for an informal visit with Twilight and her friends, but Pinkie Pie seems to be acting even more strange than usual. What is she up to, and will Twilight find out before it's too late?
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I was really striving for an "almost like watching a new episode!" feel with this fic, and I hope it shows.