This plugin has a handful of features that will benefit your server in adding a custom currency to your server alongside a shop in the form of the GUI to reward your players for earning this currency. Coins (or whatever you choose to name them) can be added to players using commands and everything is stored via MySQL so your server must have a database system to use this plugin. The GUI can have multiple pages and the order of the items is the order that is placed in the config. This is possibly going to change in future though.
