BleachBit - Quickly frees disk space & tirelessly guards your privacy

BleachBit quickly frees disk space and tirelessly guards your privacy, free cache, delete cookies, clear Internet history, shred temporary files, delete logs, and discard junk you didn't know was there.

Comodo System-Cleaner - All-in-one Registry, Disk & Privacy Cleaner

Comodo System-Cleaner collects three free and useful cleaning utilities: Registry Cleaner, Disk Cleaner, and Privacy Cleaner. Running these utilities will rid your computer of duplicate, harmful, or otherwise unnecessary files.