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 Email 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.