MultiBoot USB
This is a project that contains a collection of GRUB files and scripts that will allow you to create a pendrive capable of booting different ISO files.
Sabayon is a Gentoo-based distribution which follows the works-out-of-the-box philosophy, aiming to give the user a wide number of applications that are ready for use and a self-configured operating system. Sabayon offers the user an easy-to-use workspace with a captivating look, good hardware detection and a large number of up-to-date software packages installed by default, with additional software available from a repository. Sabayon is available in several flavors featuring respectively the KDE, GNOME and Xfce desktop environments.