Angry Golem (web)     D&D 5e (no source link)
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Pathfinder 2e Bestiary 1     Pathfinder (no source link)
Monster Manual 3     D&D 4e (no source link)
Critter Cache: Animals And Beasts     D&D 4e (no source link)
Hacklopedia Of Beasts     Hackmaster (no source link)
QUERP Bestiary     QUERP original/official source