Concept: “You should never feel the need to flip through the book while you’re killing PCs.”
Content: Mörk Borg’s core rules on a single page
Writing: Clear and concise
Art/design: The standard version puts emphasis on efficiency without sacrificing the characteristic aesthetics; available in printer-friendly and minimal versions
Usability: A model of usability

Official: English, Swedish
Reglas de Mörk Borg en Español by Unlucky Tales

Concept: Random character generator including exclusive content
Content: Includes all character options from the rulebook as well as exclusive content
Writing: Descriptions concisely characterize additional abilities
Art/design: Clean, clear, well-delineated presentation
Usability: MBC content can be toggled on/off; includes a print option to save your scvm

Concept: “A Compiled PDF of all Scvmbirther exclusive content with rules for using it at the table!”
Content: Additional class abilities for Fanged Deserter and Wretched Royalty as well as optional results for weapons, armor, gear, Terrible Traits, Broken Bodies, and Bad Habits rolls; includes directions for incorporating content into character creation
Writing: On par with the core book’s quality
Art/design: Primarily typographical, but choices make for easy reading and use
Usability: A minimally intrusive way to add new content to character generation  

Concept: “AN UNENDING TIDE OF MONSTERS AND MISCREATIONS.”
Content: A digital adaptation of the monster generator from MBC: Feretory
Writing: Pelle’s gloriously weird sensibility in full effect
Art/design: Presented clearly and cleanly without sacrificing visual character; features a rather unpleasant egg
Usability: “Now, make a million monsters.”

Concept: “Relics of a forgotten mind-cult”
Content: More powerful than scrolls and more fragile
Writing: Esoteric titles on par with the core book’s Powers; mechanics and effects are easy to understand
Art/design: Entries are visually stylized as tablets with pink titles pop against the yellow ground; illustration reinforces the tablets’ grim power
Usability: Intended for use with the Forlorn Philosopher but could be used by other classes

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.