The Monsters Know What They're Doing 2 (moar)     Dungeons And Dragons (no source link)
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Mythic Monster Manual v2     Pathfinder original/official source
Untamed Wilds     D&D 5e original/official source
Critter Compendium     D&D 5e original/official source
Monster Monday (web)     D&D 5e original/official source
Monster Manual 3     D&D 4e original/official source