Pathfinder 1e Bestiary 2     Pathfinder original/official source
Tome Of Horrors Complete     Pathfinder original/official source
Tome Of Horrors 2018     D&D 5e original/official source
Monster-A-Day Compendium     D&D 5e original/official source
MojoBob (web)     D&D 2e original/official source
Monster Guide     World Of Warcraft RPG original/official source