The Monsters & Creatures Compendium     Any (no source link)
Dracopedia Bestiary: An Artist's Guide     Any original/official source
Angry Golem (web)     D&D 5e original/official source
Pathfinder 1e Bestiary 1     Pathfinder original/official source
Pathfinder 2e Bestiary 1     Pathfinder original/official source
Monster Codex     Pathfinder original/official source
Classic Horrors Revisited     Pathfinder original/official source
Lost Lands: Tome Of Blighted Horrors     Pathfinder original/official source
Monster Manual     D&D 5e original/official source
Flee, Mortals     D&D 5e (no source link)
Book Of Beautiful Horrors     D&D 5e (no source link)
Monster Ecology Anthology     D&D 5e (no source link)
Dungeons And Dragons Essentials: Monster Vault     D&D 4e (no source link)
Scruffy Grognard's Monstrous Manual     D&D 2e (no source link)
Dragonlance Bestiary     SAGA (no source link)
Critters, Creatures, & Denizens     Dungeon Crawl Classics (no source link)
Monsters Compendium     Heroes Of Adventure (no source link)
Old World Bestiary     Warhammer original/official source
Fantasy Age Bestiary     Fantasy Age original/official source
The Monster Overhaul     OSR (no source link)