Pathfinder / D&D 5e (~), ponies (++)
I gotta thank @IceWeasel for pointing this out to me:
https://bundleofholding.com/presents/Ponyfinder
It's a set of books that manages to take so much of what's so compelling about the world of _My Little Pony: Friendship is Magic_ and adapt it to the CW'd tabletop RP systems.
It reminds me – in all the best ways – of the ponified D&D 4e campaign that @baxil ran, and that I had the privilege of participating in. I haven't read sourcebooks this eagerly in a _long_ time.