You can also check DeluxeMenus GitHub Wiki
DeluxeMenus is the all in one inventory GUI menu plugin! You can create GUI menus that open with custom commands that will show stats or perform actions specific to the player who opened it.
The developer is active and intends to add as many features as possible while keeping the plugin efficient and simple. This wiki will contain links to pages with information on each attribute for items and guis. It will also include a detailed page on requirements and some example guis.