Autopsy forensic browser
The autopsy forensic browser is an open source graphical interface to the command line tools of the sleuth kit for the analysis of ntfs, fat, ext2fs, and ffs file systems
http://www.sleuthkit.org/autopsy/download.php
Sleuthkit
The sleuth kit is a collection of open source command line tools for the forensic analysis of ntfs, fat, ext2fs, and ffs file systems
http://www.sleuthkit.org/sleuthkit/download.php
The coroner's toolkit
the coroner's toolkit
http://www.porcupine.org/forensics/tct.html
Windows forensic toolchest
windows forensic toolchest
http://www.foolmoon.net/security/wft/