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.
Parted Magic is a small live CD/USB/PXE with its elemental purpose being to partition hard drives. Although GParted and Parted are the main programs, the CD/USB also offers other applications, such as Partition Image, TestDisk, fdisk, sfdisk, dd, ddrescue, etc. In August 2013 the distribution became a commercial product and is no longer available as a free download.