Autopsy - The Sleuth Kit - Autopsy is an open source graphical interface to The Sleuth Kit and other digital forensics tools.
LogikCull - Logikcull is a discovery automation platform that helps expedite and lower the cost of litigations & investigations.
Forensic Toolkit FTK - Digital Investigations
Everlaw - Everlaw is an eDiscovery software for litigation, document review, and analysis.
Recuva - Accidentally deleted an important file? Lost files after a computer crash?
Relativity - Cloud-based eDiscovery software for data analysis & review