From Rootware Soft:
Secure Shield lets you password protect any program or folder. Simply drag and drop any office documents, software, personal finance records, e-mail attachments, or virtually any other sensitive data and Secure Shield takes care of the rest. Secure Shield uses industrial-strength 128-bit AES encryption to ensure that your private data stays just that - private. Secure Shield also includes a secure file anonymizer to effortlessly shield large groups of files from prying eyes. After anonymizing, you, and only you, are able to restore them to their original form.