Scrambled Egg can easily encrypt your messages using AES, ARC2, Blowfish, CAST, or DES3, then encode the result in a printable form, using Base64, Base32, HEX, Quopri, string escape, UU, or XML.
The resulted string can be sent on e-mail as text, saved as XML or UU, or can be transformed into a little PNG image.

The license of this software is Free, you can free download and free use this file encryption software.