The plugin I am requesting to be added is KeepInventory now i know what you're thinking, there's a gamerule for that you don't need a plugin, the gamerule sets keep inventory for everybody while the plugin i am suggesting adds the ability to only give it to certain players or roles, this would make it very easy for administrating different worlds on the same server, as well as adding another possibility to add to certain paid roles.
Plugin link: https://dev.bukkit.org/projects/keep-inventory
Thank you in advance for spending your time reading these posts.