NOTE 1: Complete 5E games from other publishers are outside the bounds of this discussion. I mean, you can do what you want, I'm not your dad, but my intent is to discuss supplements and adventures made specifically for WotC 2014 5E.
NOTE 2: A couple years ago I would have also disqualified GMsGuild material, as I want to discuss supplements made by 3rd Party Companies, but it has become increasingly clear that folks making DMsGuild stuff are just as talented and put in just as much effort as "real" 3PP companies, so feel free to talk about that stuff.
FINAL NOTE: Where you can, link the awesome products you are mentioning.
Okay, with all that preamble out of the way: What, in your purely subjective opinion, is the best supplement or adventure put out for 5E by a company or person that is not WotC? What is great about it? Why is it your favorite, in particular? Where can it be found?
NOTE 2: A couple years ago I would have also disqualified GMsGuild material, as I want to discuss supplements made by 3rd Party Companies, but it has become increasingly clear that folks making DMsGuild stuff are just as talented and put in just as much effort as "real" 3PP companies, so feel free to talk about that stuff.
FINAL NOTE: Where you can, link the awesome products you are mentioning.
Okay, with all that preamble out of the way: What, in your purely subjective opinion, is the best supplement or adventure put out for 5E by a company or person that is not WotC? What is great about it? Why is it your favorite, in particular? Where can it be found?