Folder Guard - Folder Guard is powerful security software for Windows 7, Vista, XP, 2000.
Folder Lock - Folder Lock is a security software that helps you to password protect files, shred files, clean history, encrypt the personal documents and much more.
Vov Hide Files - Lock your files and folders from prying eyes.
My Lockbox - My Lockbox is a security software enabling you to password protect any folder on your computer.
Wise Folder Hider - Wise Folder Hider is a free file/folder hiding tool.
GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).