iOpus Secure Email Attachments 1.0
This allows you to create a compressed attachment with 448-bit encryption.
It allows you to send self-decrypting archives; the recipient just double-clicks the file and enters the password when prompted. The original files are then decrypted, extracted and written to your disk automatically.
You can include your company logo, a custom message and a link to your home page. You can also display a disclaimer that must be accepted before the file can be decrypted.