LessIsMore lets you create custom informational commands. This is like /rules plugins, but you can do a lot more:
Multiple commands with any name and description
If the command has too many lines of output, they will be separated into different pages
You can change the lines-per-page for each command, or different lines per page (using the "line break" command, see the /more command in the example config)
How to setup this plugin? Install it in your server, start the server once, and a config.yml will be created in the plugin_data/LessIsMore/ (plugins/LessIsMore/ for old users) folder. There will be examples for different ways of adding commands in the file.
Have fun making commands just for your own server!