UltraISO is an ISO/CD/DVD image file creating tool, which also allows you edit and convert ISO/CD/DVD image files.

NTLite Free is an app for Windows administrators that allows you to edit Windows installation images.

SARDU multiboot creator build one All in One USB media thumb drive or DVD.

Burnaware is a free CD, DVD, Blu-ray burning software with multilingual user interface.

WinToFlash is a useful tool that can help you create a bootable Windows setup USB drive from a CD or DVD.

XBoot is yet another neat little Multiboot ISO USB Creator.