Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Not everything is as it seems when Dinky visits her mother in the hospital.

Connected to Chengar Qordath's "Saying Goodbye"

Now a dramatic reading! Courtesy of Lisa M.
Part 1
Part 2

Twilight Sparkle is a gifted student and scholar. When she attempts to harness her creative side by writing a science-themed sensual romance novel, however, things rapidly get out of hoof. Can her friends stage an intervention before she humiliates herself (and them) at a prestigious literature recital?

No. No, they cannot.

We all wear a mask called composure, beneath which hides a heart that twists with guilt and hidden feelings. Regal as she is, Princess Celestia is no exception. What might be revealed should circumstances cause this mask to slip - or break?

Set several years after the potential conclusion to the series.

Though Scootaloo normally appears to be a happy and lively little filly, every once in a while she reacts in a way that catches other ponies attention. Especially the ponies she spends the most time with, Rainbow Dash and her friends, seems to take notice of these little things.

When she finally reacts in a way that cannot be ignored, it is up to Rainbow Dash to find out what terrible secret Scootaloo is really hiding.

When a freak reading accident causes Twilight to be admitted to the Ponyville hospital, Rainbow Dash is right by her side. Compelled by a sense of duty and repayment, she takes it upon herself to cheer up her friend.

Distance can drive us apart. It can also bring us closer together.

After all is said and done, and the ponies have gone their separate ways, the only way they have to keep in touch is through letters.

Original Equestria Daily post is here
Russian translation
Chinese translation
Polish translation
Spanish translation

Now with music and audiobook