Digital forensics tools
Autopsy is a security tool for digital forensics. It provides a graphical interface to The Sleuth Kit and other forensics tools.
Bitscout (remote forensics meta tool)
Bitscout is a security tool that allows professionals performing digital forensics remotely. The toolkit creates a live-cd for this purpose.
dfis (DFIR toolkit)
Digital Forensic Investigative Scripts, or dfis, is a collection of scripts that can be used during forensic investigations.
shellbags (extract information from Windows Registry file)
Shellbags is a script written in Python to parse the Windows Registry file. It extract related information from directories browsed by Explorer.
The Sleuth Kit (toolkit for forensics)
The Sleuth Kit is a toolkit to investigate disk images and do forensic analysis on them.