NotMyMob is a very simple and lightweight plugin that will allow you to choose which mobs are allowed to spawn in each world. It supports use of a mob whitelist and blacklist as well as the option to use a world whitelist or blacklist. You can change these values in the config.yml file and you can also add/remove mobs from the white/blacklist via the in-game commands.
Features - World whitelist or blacklist - Mob whitelist or blacklist - Lightweight - In-game commands to add/remove from list
Commands - /nmm <add/del/list/reload>
Permissions - nmm.admin
Plugin Support If you are in need of plugin support/bug fixes, you can join the discord server and submit them there. I will try and fix any issues you find ASAP.