This really isn't a plugin, but it can be used for any extension of plugins, if you want to use SQL in your plugins, so I made a library that you can easily make SQL databases easily without hesitation/complex codes. I called it SSQL(Simple Structure Query Language) You can use this library in your plugin if you want to include SQL for extra data.

You can download/Documentation is here:
SSQL - Github
*All Credentials are required!*

Hope you enjoy this little library, that I made!