Cryptoken
The cryptoken is a usb smart card in a small and robust metal case which adds strong authentication features to security applications which provide secure logon, email encryption and digital signatures or vpn connections.
http://www.cryptoken.com
Javamail Crypto
Javamail Crypto
http://javamail-crypto.sourceforge.net
Brighthub
There are a number of free encryption and cryptographic software for emails. email encryption software can provide a secure and a safe way to communicate via email. not all email encryption software is good, so be careful as some may do more harm to your pc than good. the article presents software reviews of each program in order to help users chose the right one. there is sure to be one free software in the article that is a solution that fits your needs.
http://www.brighthub.com/computing/smb-security/articles/38933.aspx
Softsea
Cryptoheaven download, . a email encryption software, email software
http://www.softsea.com/review/CryptoHeaven.html
Cryptoheaven
Cryptoheaven is a provider of secure and encrypted email server hosting, and secure online storage and collaboration solutions.
http://www.cryptoheaven.com
Voltage SecureMail
Voltage SecureMail
http://www.voltage.com/products/securemail.htm