ODIN (Open Disk Imager in a Nutshell) is a simple stand-alone program running under Windows. I does not require installation, can be run even from CD or USB stick. ODIN uses the Windows API for raw disk access which ensures robustness and support of all Windows file systems (but therefore does not give you support of file system from other OS like ext3). ODIN can save only used blocks, optional compress data and split files. It runs under Windows PE (I tried with Bart PE). Using a boot CD is currently the only way to backup a Windows partition as backup of the system partition from a running Windows installation is not yet supported. ODIN can verify backup images for damages before restoring them to disk.
ODIN 0.1 is still in an early phase of development, not as powerful as commercial imagers but therefore very lightweight. There seems to be always have been a lack of freely available open source based disk imagers running under Windows. Having the possibility to integrate such a useful tool into boot disks without license issues might be attractive for one or the other reading this forum. And not having to deal any longer with questions whether /dev/hdax is my drive Y: or Z.: when I want to backup my PC to save the hours of installation efforts is an advantage in my opinion

Comments are welcome.