In the small town of Rainbow Falls, amid the constant hustle and bustle of the trade exchanges and Equestria games tryouts, a little alchemy shop goes relatively unnoticed by tourists.
The townsponies know better, though. The shop's proprietor has magical power to rival the best in history, and has on more than one occasion gone off to hunt monsters alone for ingredients.
It's a pity that in the crazy world of Equestria, all he wants to do is run his shop.

Now with cover art by Little Tigress!

Twilight becomes alicorn of the stars. This is sort of a problem, because Luna kind of already was alicorn of the stars. Oops!

TV Tropes

When passions flare and new relationships begin at the Grand Galloping Gala, it can be difficult to sort things out through the warmth and glow of young, budding love. Princess Twilight Sparkle and Captain Spitfire know full well such things are supposed to have a certain progression, but they're not going to let that stop them from enjoying each other's company as much as they can.

Prereading/Editing help by Cryosite, Jondor, Melon Hunter, Meridian Prime, and Timaeus.
Artwork by FlutterThrash.

The Caprica. At one time, an impressive piece of technology for humanity. Originally built for peace; retrofitted for war. But now, Marcus is all that remains of the human race after a hostile alien invasion, and he uses the only life he's ever known to escape his captors. Making a blind jump to unknown space, his skills as a pilot, and as a man in uniform, will be put to the test.

Rated teen for language and some adult situations.

After a magical mishap renders Rarity temporarily blind, Twilight Sparkle agrees to help her around the Boutique, utilizing a fancy spell that allows Rarity to see a simple outline of the world around them. It's just a gesture of good friendship; absolutely nothing more.

Nothing more whatsoever.

Who: Monochromatic
When: Interwoven Colours Conest
Where: RariTwiGroup
Why: Panties

Metal ponies tell their stories,
Scientists in laboratories,
Lay the wire, mount the brain,
Mount their hips, teach them pain.
Teach them fear of revolution,
Internalize the evolution.
Set their ruin on the throne,
Until their chains become their own.
Palaces and hollow eyes,
To the Masters goes the prize.
And if this act should be maligned:
"For the good of ponykind."

Winner of the September Writeoff Contest, "True Colors." Edited by Horizon.

This story is a sequel to Stardust

When Equestria’s newest member of royalty asks for aid to be offered to her friends from abroad, the best and the brightest volunteer to serve. Captain Steel Song of the Dusk Guard are immediately mobilized to help XCOM defend their world from the enemies that besiege them. However, their first joint operation with the humans takes a turn for the worse and they quickly find themselves fighting for their lives against the full force of the monsters that threaten Earth.

(Stardust/Dusk Guard crossover)
(Coverart provided by a friend of Viking ZX!)
(While familiarity with both stories isn’t required, it is recommended)
(Many thanks to Arzoo for pre-reading!)
(All screenshots can be found at XCOM.wikia.com)
(Featured on 3/13/2013. Thanks everyone!)
(Now has it's own section on TVTropes as part of the Stardust series!)

This story is a sequel to Stardust

Twilight has finally returned home from the harrowing challenge that Discord set upon her, and the residents of Ponyville and the Elements especially look forward to having their dear friend returned to them.

Twilight, however, has changed. Still suffering from her injuries, almost incapable of using magic and haunted by the memories of her time on Earth, she becomes increasingly withdrawn from those who were closest to her. Will her frustration at her current state and her friends inability to understand her experiences cost her what she valued most before Discord's bet?

(Sequel to Stardust, familiarity with this is recommended!)
(Proofread by Arzoo!)
(Coverart commission drawn by the amazing KairaAnix!)
(Crossover with XCOM: Enemy Within, though the crossover and human elements are minimal)
(Featured 4/28/2014, thanks folks!)

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)

MLP/Undertale crossover.
Not a PWNY-verse story.

Long ago, the Monsters and Humans fought a great war. The Monsters lost, and were sealed in the Underground. It would take the power of seven human souls to break the barrier that kept them imprisoned. They only had six. And so the Monsters waited and hoped, praying that another human would find their way to the Underground. Some thought the seventh soul would give their King the strength to break the barrier. Some dreamed of a human who would be their friend, and save them all...or had nightmares of one who would bring back the war.

...but nobody came.

...but somepony did.

Eons after the war, with no way to tell how much time had passed above, a tiny blue filly with wings and horn fell into the underground, calling for her Mama. None knew the poor creature's nature or origins...but her soul was powerful with magic, even more so than a human soul.

None can know what will come...of this little 'Woona'.

Cover art by Sanyo21