ControlMail  
   Document security software using sophisticated encryption techniques to send information via the Internet. The sender can apply security rights to control how a recipient handles the document information.
   http://www.controlmail.com

iSolv Technologies TSPMail  
   Provides security for e-mail communication without modification to existing software or network components through the use of Microsoft Winsock2 technology.
   http://www.isolv.co.za/TSPMail/TSPMail.html

Zixmail  
   Web based messaging offering secure delivery. Registration required by the sender and recipient. PC Magazine's Editor's Choice award. Compatible with other web based mail services. User does not have to change email accounts.
   http://www.zixmail.com

PostX  
   Provides secure Internet-based solutions that enable businesses to confidentially deliver high-volume, high-value information to each customer using Email and the Web.
   http://www.postx.com

Zip File Encryption  
   Software to encrypt/decrypt/shred zip files for emailing. Recommended by PCWorld. Provides archive facilities and the built in compression feature makes for smaller files for transmitting.
   http://www.secureaction.com

Ensuredmail  
   Ensuredmail is a client side application that encrypts emails and files. Compatible with Outlook. Free download available.
   http://www.ensuredmail.com

Zendit  
   Free one-click encryption for Outlook or any web-based mail using IE and Windows 95+. Download-able client software.
   http://www.zendit.com/

Web Based Secure Delivery from Etekmail  
   Secure delivery for individuals and businesses. Can be used with an existing email account. 90 days free trial.
   http://www.etekmail.com

CryptoHeaven  
   Premium secure instant messaging, chat, online data storage, file sharing and email using 256 bit encryption. Free download offering 2MB of storage. Upgrades of storage and bandwidth are available.
   http://www.cryptoheaven.com

Labcal Technoliges - IsoShieldMail  
   Lotus Notes Plug-In for exchanging secure mail using Entrust's PKI technology.
   http://www.labcal.com/isoshieldmail.php3

DespatchBox,  
   DespatchBox offers: security, authentication, digital signatures, tracking, and auditing to email systems in the form of an easy to use application.
   http://www.despatchbox.com

FileBottle.com  
   Send free passcoded emails. Simple to use.
   http://filebottle.com

Microvault.com  
   Secure document delivery over the Internet without requiring the consumer to download, install, learn or use any special hardware or software.
   http://www.microvault.com

Tumbleweed Communications  
   Tumbleweed messaging solutions combine Internet technologies in electronic mail, Web, databases, encryption, and content filtering to offer complete, secure electronic messaging solutions for e-business.
   http://www.tumbleweed.com

CenturionSoft - Privacy Security Encryption  
   Software designed for businesses and consumers. Utilities include: privacy protection, encryption of emails and files, and productivity tools for MS Windows.
   http://www.centurionsoft.com

GlobalCerts  
   Offer a secure email gateway solution for businesses. Includes live demos, webcasts and brochures.
   http://www.globalcerts.net/