Monster Manual     D&D 4e (no source link)
Dragon Magazine     D&D 2e/3e (no source link)
MojoBob (web)     D&D 2e original/official source
Monstrous Manual: Dragonlance     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)
Bestiary Of Cryptofauna     Old School Essentials (no source link)