Concept: “A collection of tables, monsters, items, classes, rules and ideas”
Content: Includes a random monster generator, rules for distance travel and subsistence, The Death Ziggurat and Goblin Grinder adventures, rosters of mundane and profane gear, the Grey Galth Inn setting, a gambling minigame, the Black Salt environmental hazard, new character classes (Cursed Skinwalker, Pale One, Dead God’s Prophet, Forlorn Philosopher), and new Powers
Writing: Mörk Borg imagery and tone in wide a variety of styles
Art/design: Matches content to myriad layout and design strategies
Usability: The mechanical and expository elegance you expect from Mörk Borg; the monster generator particularly uses dice in a clever way 

Concept: “A cosmic necrocrawl at the end of time”
Content: Pre-apocalyptic hexcrawl with random elements
Writing: Fairly elaborate with plenty of horrible imagery
Art/design: Captures the mood, setting, and characters well
Usability: Fun and lethal;  separate player and GM maps are quite helpful

Bonus: Generate some dialogue seeds for your rot priests at https://perchance.org/rot-priest-thoughts

Concept: “100% of the benefits are to be donated to Direct Relief.” 
Content: A porcine-deity crawl, NPCs to murder, a fallen angel hunt, more ways to break your body, d66 murder implements, a weird egg, some cool essays, and stuff for those other Kartell games.
Writing: Some great insight into how to run or design for rules light games, along with some truly Miserable examples.
Art/design: Dark, gritty, a little messy, and fun. 
Usability: You can identify the Swedish printing by (paper) weight. I’ll give you a hint, the title can be abbreviated TP.