As is traditional, I've put together a Friendship is Card Games article for the eligible entries. Each card links to its story, but if you're looking for a particular story (say, yours,) here's a handy cheat sheet

Pact of the Sun: World of Colgates
Nick of Time: Apple Preserves
Sweetfeather Friendship: Bipartite Butterflies
Irreconcilable Similarities: Twilight Squared
Big-Hearted Medium: The Ghost Who Never Died
Mundane Counterpart: Sunset Shimmer Discovers She’s a Pop Star
Transitory Ruler: Time Enough
Nacreous Transformation: A Tale of Two Musical Notes
Worldline Hopper: What Worked Last Universe
Crystal Prep Designer: Cut From the Same Cloth
Self-Reflection: From the Heart
Capture Clone: The Grass is Always Greener
Mirror-Match Liaison: Mirror Match Inc.
Untouchable Socialite: Love Can Be Enough
Destined Heir: I Don’t Want to Be
Asylum Demon: Lost Loves
Aging Familiar//Ancient Dragon: Dog Years
Underworld Cookbook: CMCsquared
Disaffected Youth: Don’t Make the Same Mistakes I Did
Sunset, Weaponizer: The New Hacker in Town
Curbstomp: Dealing With a Dazzling Dissension with a Distrustful Double
Star Swirl the Shaven: The Pillars of Equestria: The Temple of Enyalius
Oleaginous Anomaly: Why Don’t I Have Wings Like You?
Interplanar Scissors: Rainbow Dash is… Average?
The Cold Vacuum of Zpeis: How to Train Your Evil Doppelganger
Find the Bright Side: Some Days Are Dark And Lonely
Lethemancer’s Spite: Memories of Myself
Squandered Talent: Stomachaches
Ditzy, the Infinite: Daring Do and the Ditzy of Infinite Possibility
Sunmane Outfitter: “Where is My Daughter?”
Ageless Archivist: Ill Met By Sunset
Lyra, Combine Renegade: Heartstrings Transplant
Starlight, Ponyville Tyrant: Left Behind
Haunting Analogue: Apples in the Mirror