Autopsy - The Sleuth Kit - Autopsy is an open source graphical interface to The Sleuth Kit and other digital forensics tools.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Encase eDiscovery - EnCase eDiscovery helps litigation experts to establish best practices throughout the e-discovery workflow.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Forensic Toolkit FTK - Digital Investigations
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode