Angry Golem (web)     D&D 5e original/official source
Tome Of Horrors Complete     Pathfinder original/official source
MojoBob (web)     D&D 2e original/official source
Scruffy Grognard's Monstrous Manual     D&D 2e (no source link)
Hacklopedia Of Beasts     Hackmaster original/official source
Lairs And Encounters     Adventurer, Conqueror, King (no source link)