ghost http://freshmeat.net/projects/g4l/ this is the best i have seen so far , its very similar to Norton Ghost .
Few more :
PartImage: partimagehttp://www.debianadmin.com/backup-and-restore-linux-partitions-using-partimage.html
Gparted: gparted!! http://gparted.sourceforge.net/
Mkcdrec: mkcdrec http://www.improvedsource.com/view.php/Linux-System/18/
Clonezilla: clonezilla http://clonezilla.sourceforge.net/