Folder Lock

Folder Lock screenshots

Password-protect your sensitive files, folders, drives, and even USB devices
Folder Lock 7.3 : Protect USB/CD Section

Alternative downloads

Folder Guard
Lock your most sensitive files and folders and protect them from prying eyes.
Lock Folder XP
Helps you password-protect or hide important documents.
GiliSoft File Lock Pro
Protect your sensitive files and folders with a password-protected lock.