Seems to be way better than Win32DiskImager that crashes on bootup if you breathe funny.
Original Description:
USB Image Tool can create images of USB flash drives, SD cards and any other devices that are mounted as USB storage drives. It can create an exact byte copy of these devices in raw and compressed image formats and also restores or write images on the device.Features:
* create image files of USB storage devices
* restore images of USB storage devices
* compressed image file format (gz and zip)
* adjust GPT table to maintain partition numbering
* show USB device information
* manage favorite USB images
* command line utility
Source: