SpeakFreely

Encrypt your email messages for private conversations over the Internet. SpeakFreely is a powerful stealth email encryptor, which can be used with any email client (client independent). It provides all the commonly used Internet encryption algorithms without the complexity or hassle of certificates or signatures. By selecting email addresses which should be encrypted, secure email connections can be created over the Internet or Intranet.

Requirements:

Windows 95/98/Me/NT/2000/XP

Limitations:

60-day trial