TestDisk checks the partition and boot sectors of your disks. It is very useful in recovering lost partitions.
It works with :
DOS/Windows FAT12, FAT16 and FAT32NTFS ( Windows NT/2K/XP )Linux Ext2 and Ext3BeFS ( BeOS )BSD disklabel ( FreeBSD/OpenBSD/NetBSD )CramFS (Compressed File System)HFS and HFS+, Hierarchical File SystemJFS, IBM's Journaled File SystemLinux RaidLinux Swap (versions 1 and 2)LVM and LVM2, Linux Logical Volume ManagerNetware NSSReiserFS 3.5, 3.6 and 4Sun Solaris i386 disklabelUFS and UFS2 (Sun/BSD/...)XFS, SGI's Journaled File System
PhotoRec is file data recovery software designed to recover lost pictures from digital camera memory or even Hard Disks. It has been extended to search also for non audio/video headers. It searches for
Sun/NeXT audio data (.au)RIFF audio/video (.avi/.wav)BMP bitmap (.bmp)bzip2 compressed data (.bz2)Source code written in C (.c)Canon Raw picture (.crw)Canon catalog (.ctg)FAT subdirectoryMicrosoft Office Document (.doc)Nikon ds