The Monsters & Creatures Compendium     Any (no source link)
The Monsters Know What They're Doing     Dungeons And Dragons original/official source
Angry Golem (web)     D&D 5e original/official source
Pathfinder 1e Bestiary 2     Pathfinder original/official source
Monster Manual     D&D 5e original/official source
Monster Monday (web)     D&D 5e original/official source
Monster Ecology Anthology     D&D 5e (no source link)
Midgard Bestiary     13th Age (no source link)
Adventures Dark And Deep     Adventures Dark And Deep (no source link)