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.
Redcore Linux explores the idea of bringing the power of Gentoo Linux to the masses. It aims to be a very quick way to install a pure Gentoo Linux system without spending hours or days compiling from source code, and reading documentation. To achieve this goal, Redcore provides a repository with pre-built binary packages which receives continuous updates, following a rolling release model.