1)   Universal Shield 4.4.1
Universal Shield 4.4 is a powerful tool, combining data hiding, protection, and encryption: hide your files, folders, and drives, and set access rules. This program has the most flexible security combinations for your precious data.
hide folder, lock folder, folder lock, file lock, folder password,

 2)   Free Folder Hider 10.6
Folder Hider can hide and password-protect your files, folders, pictures, and documents in seconds.
folder, lock, folder lock, lock folder, folder locker, lock folders, lock files, folderlock, password protect folder, password protect folders,