Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.

Rufus - Rufus is a piece of software that allows you to transform a portable drive, like a flash drive or other USB drives, into a bootable drive that can be used for a variety of purposes. Read more about Rufus.

Ultimate Boot CD - The last Boot CD you'll ever need. You need the Ultimate Boot CD if you want to:

YUMI - YUMI (Your USB Multiboot Installer), is a tool that allows you to boot multiple ISO files from one USB drive.

AOMEI PE Builder - Free tool to create bootable USB drive, CD/DVD or ISO file based on Windows PE.

SUSE Studio ImageWriter - Utility for writing raw disk images & hybrid isos to USB keys.