GPART

http://www.stud.uni-hannover.de/user/76201/gpart/

gpart - Guess PC-type hard disk partitions
Gpart is a tool which tries to guess the primary partition table of a PC-type hard disk in case the primary partition table in sector 0 is damaged, incorrect or deleted. The guessed table can be written to a file or device. Supported (guessable) filesystem or partition types:

DOS/Windows FAT (FAT 12/16/32)
Linux ext2
Linux swap partitions versions 0 and 1 (Linux >= v2.2.X)
OS/2 HPFS
Windows NT/2000 FS
*BSD disklabels
Solaris/x86 disklabels
Minix FS
Reiser FS
Linux LVM physical volume module (LVM by Heinz Mauelshagen)
SGI XFS on Linux
BeOS filesystem
QNX 4.x filesystem