This story is a sequel to Past Sins

Hearth's Warming is a time for friends and family to come together, celebrate harmony, and welcome the new year. Nyx is looking forward to just this as she rides the train to Canterlot with Spike and Twilight. She's going to meet her extended family for the first time and wants nothing more than to make a good impression. Yet, the sheen of the holidays can't hide the trouble caused by meddling grandparents, relentless reporters, and a paranoid uncle.

An influx of weather duties has left Rainbow Dash more overworked and exhausted than ever. With no funds to go on a proper vacation to blow off steam, Rainbow is trapped in a endless cycle of waking up, going to work, and going to sleep.

When Rainbow's responsibilities make even flying no longer fun, Twilight offers to let her stay at the library for an all-expenses paid staycation. Though a little unsure, it doesn’t take much convincing from Twilight for Rainbow to change her mind. Expecting to just find some peace and quiet for a few days, Rainbow finds that and much more.

My (extremely late & winning) entry for the Third TwiDash Group Contest.

Editing done by The Abyss and DarqFox

Cover art by Rossby Waves

At her coronation after-party, Twilight gets a little freaked out at the prospect of growing into her new life, especially one specific aspect of it. She knows better than anyone that talking her problems over with a friend can help tremendously, but she doesn't have many friends with whom she'd be comfortable talking about this particular problem, let alone ones who would really understand what she's going through.

...unless she broadens her definition of "friend."

Now with a reading, courtesy of PresentPerfect! Go check it out, if you're so inclined.
Ahora en español gracias al maravilloso trabajo de SPANIARD KIWI!
(Now in Spanish thanks to the brilliant work of SPANIARD KIWI!)

Shortly after the "Mare Do Well Incident" Twilight Sparkle examines each of the ponies involved in order more fully understand the idea of heroism. The outcomes for both Fluttershy and Applejack are quite underwhelming. However, studies with Rainbow Dash bring about some interesting results.

Written for the TwiDash Group Contest

Edited by the loverly bstreetninja

When Trixie re-re-re-etc-returns to Ponyville, the girls think it's just another lame revenge plot, but this time Trixie is serious. No really. It's not simple revenge she's after, although that would be nice too. No, Trixie has a much more sinister plan. She's going to wed the most magical princess in all the land. Also, Twilight finds out about Rainbow Dash's alter ego.

Written for June Pre-reader (and exes) battle, 2013

A letter from Celestia interrupts one of Pinkie's parties with disturbing news. Now friendships will be pushed to the limit as Twilight struggles to uncover which of her friends is not who, or even what, she appears to be.

(While not a romance, this does contain a shipped pair)

in Russian

This story is a sequel to A Stitch in Time

Having discovered the message left for her by Star Swirl the Bearded in the distant past, Twilight once again finds herself caught up in the middle of a struggle against forces far greater than herself. In order to even stand a chance she'll need to travel further and wider than she ever has, and forge some unlikely alliances with old enemies. All to bring down the powers that have manipulated and shaped her entire life, and retake control of her own future.

The conclusion of the Time Loop Trilogy, which began with Hard Reset
Available in Spanish thanks to dgs1993
Series TV Tropes page

The TwiDash Project is a series of vignettes and short stories depicting the budding romance between Twilight Sparkle and Rainbow Dash behind the scenes of season two and onward, taking place during, before, and/or shortly after canon episodes.

Concept is based on the The AppleDash Project by bookplayer. Bookplayer has kindly given her blessing for others to explore the idea with different ships.

Editing by Formerly Committed.

The TwiDash Project is co-authored by bats and Subsolar Drift. Authors of different chapters will be indicated in the chapter title.

Goddammit Pinkie Pie:
Twilight shows off her vocabulary

A Typical Day in Pwnyville
An everyday experience in the life of a rainbow-maned pegasus.

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page