Encrypt Files From The Right-Click Menu
Silver Key Free Edition (formerly Iron Key) allows you to encrypt files from the Windows Explorer right-click menu, and create a self-decrypting EXE file, that can be sent via email and does not require the receiver to install any decryption software.You can also choose to create an encrypted "Parcel" which will create a password protected .sk file that requires Silver Key to be installed on your computer. The program uses AES encryption.
Download Link1 Link2