See https://plus.google.com/+KyleMaxwell/posts/bsm6tj4SdWP
- http://donjon.bin.sh/m20/monster/
- http://summon.totalpartykill.ca/
- http://chaoticshiny.com/monstergen.php
- http://www.drivethrurpg.com/product/58916/Random-Esoteric-Creature-Generator-for-Classic-Fantasy-RolePlaying-Games-and-their-Modern-Simulacra
- http://followmeanddie.com/2015/05/18/add-appendix-d-random-generation-of-creatures-from-the-lower-planes/
- http://www.mithrilandmages.com/utilities/Esoteric.php
- http://www.drivethrurpg.com/product/62850/The-Creature-Crafter
- https://drive.google.com/file/d/0ByE7qi0l8MuYNy0zWWhKSHgzbG8/view