SSLWrap
- An inetd service (for Unix operating systems) that sits over POP3, IMAP, and SMTP, and encrypts data using SSL.
- http://www.rickk.com/sslwrap/

secure server sitemaker1.com
- If you are taking credit/debit cards, you will need a secure ordering option on your web site. Our secure server service offers a totally safe way for your clients to send their credit/debit card details.
- http://www.sitemaker1.com/secureserver.html

Stunnel
- A universal SSL tunnel. It is designed to work as SSL encryption wrapper between remote client and local (inetd-startable) or remote server. [Free / Open Source]
- http://stunnel.mirt.net

Apache+SSL Win32 HOWTO
- Setting up Apache with mod_ssl on Windows NT and 98 to provide secure HTTP services.
- http://tud.at/programm/apache-ssl-win32-howto.php3

Stunnel FAQ - Frequently Asked Questions
- Where to get the software, how to install and run it, and troubleshooting tips.
- http://www.onsight.com/faq/stunnel/

Covalent Technologies, Inc.
- Offers Covalent Enterprise Ready Server with 128-bit SSL and other enhancements to the Apache 2.0 Web server in the areas of security, reliability, and manageability.
- http://www.covalent.net/

Apache and Secure Transactions
- It explains what SSL is, why Apache does not have it built in, and why it is such a complex issue. (Apache Week)
- http://www.apacheweek.com/features/ssl

mod_ssl: The Apache Interface to OpenSSL
- The module provides strong cryptography for the Apache 1.3 webserver via SSL and TLS protocols, it was developed using OpenSSL, which is based on SSLeay. [Free / Open Source] (Ralf Engelschall, Ben Laurie)
- http://www.modssl.org/

Apache-SSL
- An implementation of Apache with SSL capabilities. It is based on SSLeay/OpenSSL. It is not subject to US export control. [Free / Open Source]
- http://www.apache-ssl.org/