Concept: “A variety of tools to use in combat and to make fights more interesting”
Content: Variant rules for rolling weapons at character creation, a tiered weapons table, weapon characteristics (and restrictions for using them), and mechanics for weapon availability
Writing: Primarily instructional with some creative flourish in categorizing PC types
Art/design: Readable body text with more stylistic typefaces for the headers; traditional and grunge highlighting help draw attention to section headings
Usability: Adds some complexity to weapons and combat but at a manageable level; good for groups seeking a little more tactical crunch 

Concept: “The hypnotic singing will lure creatures in close so the tree can ensnare them with its roots and drag them under.”
Content: A malicious tree grown from corpses; includes stats, effects of eating fruit, and a background narrative
Writing: Well written on all accounts, particularly the in-character anecdote
Art/design: Colors and images provide atmosphere and character
Usability: Don’t forget the fruit’s secret side-effect