A simple mod installer, has just one option and that is to let you give the user the option to choose custom modules.
You can have max 3 custom modules, everything is explained on the Thread.
Source Code: https://github.com/LouisTheXIV/Simple-Installer-Creator
You can do whatever you want with the source code, you can modify it, redistribute it, it doesn't matter.
A simple mod installer 2021-01-30
A very basic mod installer