https://www.howtogeek.com/i-turned-a-usb-drive-into-a-linux-app-swiss-army-knife/
How Jordan Gloor (Senior Editor at How-To-Geek and technology blogger) used AppImages to create A Portable, Linux based, Open Source, Swiss Army Knife.
It reminds me of the old "portableApps.com" approach, but Linux based.