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.
Xubuntu is a community-developed operating system based on Ubuntu. It comes with Xfce, which is a stable, light and configurable desktop environment.