Scalpel is a fast file carver that reads a database of header and footer definitions and extracts matching files or data fragments from a set of image files or raw device files. Scalpel is filesystem-independent and will carve files from FATx, NTFS, ext2/3, HFS+, or raw partitions. It is useful for both digital forensics investigation and file recovery.
http://www.digitalforensicssolutions.com/Scalpel/
Guide:
http://linuxaria.com/howto/recover-your-deleted-files-in-linux-using-scalpel-utility?lang=en
