aka Win32 Image Writer
This is a Windows program for saving and restoring images from removable drives (USB drives, SD Memory cards, etc). It can be used to write boot images (i.e. ubuntu-12.04-preinstalled-desktop-armhf+omap4.img) to a SD Flash device or USB flash device, making it bootable. It currently does not* support writing an ISO image to usb.
This program and source code can be downloaded from here.
* Writing standard ISO images is not supported, however hybrid images created with Syslinux's isohybrid does work.