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.
antiX is a fast, lightweight and easy-to-install Linux live CD distribution based on Debian’s “Stable” branch for x86 compatible systems. antiX offers users the “antiX Magic” in an environment suitable for old computers. The goal of antiX is to provide a light, but fully functional and flexible free operating system for both newcomers and experienced users of Linux. It should run on most computers, ranging from 256 MB old PIII systems with pre-configured swap to the latest powerful boxes. 256 MB RAM is recommended minimum for antiX. The installer needs minimum 2.7 GB hard disk size. antiX can also be used as a fast-booting rescue CD. A special Xfce edition made in collaboration with the MEPIS Community called “MX” is also available.