Rufus
Publisher's Description
From Pete Batard:
Rufus is a utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks.
It can be especially useful for cases where:
you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.); you need to work on a system that doesn't have an OS installed; you need to flash a BIOS or other firmware from DOS; you want to run a low-level utility. Despite its small size, Rufus provides everything you need.
Oh, and Rufus is fast.