MultiBoot USB
This is a collection of GRUB scripts that allows to create a bootable pendrive (USB dongle, flash stick) supporting a number of different OS images. Simply copy ISO files under `/iso-imgs`. Both UEFI and Legacy BIOS boot modes can be enabled simultaneously.
Lubuntu is a fast, lightweight and energy-saving variant of Ubuntu using the LXDE (Lightweight X11 Desktop Environment) desktop. It is intended to have low-resource system requirements and is designed primarily for netbooks, mobile devices and older PCs.