The Monsters Know What They're Doing 2 (moar)     Dungeons And Dragons (no source link)
Creature Chronicle (web)     Pathfinder original/official source
Volo's Guide To Monsters     D&D 5e original/official source
Critter Compendium     D&D 5e original/official source
Monster Manual 3     D&D 4e original/official source
MojoBob (web)     D&D 2e original/official source