Luna is no longer Nightmare Moon, and has returned to rule Equestira once again, but not everypony is so ready to forgive. When a secret organization kidnaps the Elements of Harmony and threatens to murder Luna, Rainbow Dash must go back into the memories of her ancestor Firefly, to learn the ways of the Assassins to fight this new terror and save the new princess, as well as her friends.

Credit to he4rtofcourage for the title image.

Rainbow Dash, a newly promoted Sergeant in the Galactic Republic forces, has been given the prestigious honor of joining Wonderbolt Squad, the best and brightest special operations unit in the galaxy. They're elite, they're fast, they're efficient, and best of all, Dash is one of them. But when she sets hoof on the dusty, rocky world of Ord Mantell for the first time, she discovers very quickly that being the best does not make you invincible. Her selfish pride may get in the way of seeking assistance, and even the persistent pestering of a certain Smuggler may not be enough to save the Sergeant from an untimely demise at the hands of the rebellious Separatists plotting to take over Ord Mantell.

While out hiking in the mountains near Ponyville, Big Mac discovers a mysterious staff which grants him the power of the ancient god Thor. Old myths awaken, new legends are born, and one simple farm pony is thrust in the middle - as the leader of Celestia's newest crime-fighting force, The Avengers! A fusion fic with Marvel Universe, mostly Avengers.

Rainbow Dash finally did it! A sonic rainboom on command! Except she also managed to break every window in Applejack's farmhouse in the process. Now she has to pay for each one, and with her wages from managing the weather not nearly enough to cover the damage, she has to work on Applejack's farm for two whole weeks!
Talk about cruel and unusual punishment. Still, maybe it wouldn't be all bad. At least she would get to hang out with her friend AJ right? Wrong.

5-star featured on Equestria Daily.

Sequel: http://www.fimfiction.net/story/4620/Breaking-Barriers

link to dramatis personae

There was nothing left for Spitfire in Cloudsdale, just an uncle who hated her and painful memories of lost loved ones. The Pegasus Search and Rescue Corps offers her a chance to get out of town, see the world, do some good - and one day maybe have a shot at the Guards or the Wonderbolts! She jumps at the opportunity - and six days later, she limps into training camp.

Doesn't matter: she made it. The world can beat her down, but it can't keep her down. The friendships she forms here will get her through everything training has to offer. Will they also see her through the dark clouds on the horizon?

(Rated Teen for violence, language, some suggestive themes)

A love triangle is made as Carrot Top and Little Strongheart compete for Braeburn's affection, and life will never be the same again! Derpy gets a taste of cowpony life as she integrates herself into a new town and Dinky will never be taken seriously with her mother around to treat her like a foal. Join our favorite background ponies in some frontier life, adventure, and even romance?