Clonezilla is a partition and disk imaging/cloning program similar to True Image®. It saves and restores only used blocks in hard drive. Two types of Clonezilla are available, Clonezilla live and Clonezilla SE (Server Edition).
DRBL provides diskless or systemless environment. It uses distributed hardware resources and makes it possible for clients to fully access local hardware. It also includes Clonezilla, a partition and disk cloning utility similar to Ghost.
UberImaging centrally controls the disk imaging process of many nodes on a network. Clients booted via PXE are served a small initrd image containing udpcast, a client module, and other tools allowing clients to be remotely controlled by a portable GUI.
Phantom Image is a disk imaging tool written for Linux. Disk images can be used to clone computers or back up hard drives. Transparently supports local, network, CD, and other image storage locations.