Concept: “A murdered godsnake reanimated by rotten souls at the moment of its ignition into blue-green corpse-fire.”
Content: Giant, on-fire snake-guardian of the Yvy Forest
Writing: Detailed descriptions of context, setting, and creature, but no explicit mechanics
Art/design: Nice illustration and overall design
Usability: Requires some prep on the GM’s part 

Concept: “What happens when the lore of our world collides with the Dying World of MÖRK BORG?”
Content: The first volume of collected FÖLK-LORE Jam entries
Writing: Varies by author, see individual entries under the FÖLK-LORE Jam tag
Art/design: Varies by entry; single-page entries are well balanced in spreads
Usability: Varies by entry, but it’s all Mörk Borg—how tough could it be?