Pathfinder 1e Bestiary 2     Pathfinder original/official source
Pathfinder 2e Bestiary 2     Pathfinder original/official source
Mythic Monster Manual v2     Pathfinder original/official source
All Sorts Of Critters (web)     Pathfinder original/official source
Mythos Monsters     D&D 5e original/official source
Alien Archive     Starfinder (no source link)