The Monsters & Creatures Compendium     Any (no source link)
The Monsters Know What They're Doing     Dungeons And Dragons original/official source
OSE Encounter Activity Tables     Any original/official source
Pathfinder 1e Bestiary 3     Pathfinder original/official source
Pathfinder 2e Bestiary 3     Pathfinder original/official source
Tome Of Horrors Complete     Pathfinder original/official source
Fey Revisted     Pathfinder original/official source
Mythic Fey     Pathfinder (no source link)
Monster Ecology Anthology     D&D 5e (no source link)
D&D 2e Monstrous Manual     D&D 2e (no source link)
Scruffy Grognard's Monstrous Manual     D&D 2e (no source link)
AD&D Monster Manual     AD&D 1e (no source link)
Monsters Compendium     Heroes Of Adventure (no source link)
Palladium Monsters And Animals     Palladium original/official source
Adventures Dark And Deep     Adventures Dark And Deep (no source link)