This script is just a user interface combining FinalRecon and LittleBrother tools, and their GUI.
To install, just clone the repo and the submodules, and execute the setup.py script:
git clone https://github.com/EtienneDx/OsintMultitools --recursive
cd OsintMultitools
python setup.py
After calling the setup.py script, a message might appear telling you to install tkinter to get the GUI to work.
If the message does not appear, it means tkinter is already installed on your machine.