Many GUI libraries are extremely complicated for seemingly no reason which is why I created SimpleGUI. You can easily create paged or basic GUIs with extremely easy syntax. The library also has a built in item builder & editor to easily build items for your GUIs. View the GitHub for all documentation and examples on how to use this.
This resource has no use for server owners, it is for developers.
Documentation & Examples:
https://github.com/Nesanco/SimpleGUI/tree/main