LockHunter - It is a free tool to delete files blocked by something you do not know.
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
FileASSASSIN - FileASSASSIN is an application that can delete any type of locked files that are on your computer.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
IObit Unlocker - Never Worry about “Cannot Delete Files” on Your PC
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.