Apache+SSL Win32 HOWTO
Setting up Apache with mod_ssl on Windows NT and 98 to provide secure HTTP services.

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]

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.

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)

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.

SSLWrap
An inetd service (for Unix operating systems) that sits over POP3, IMAP, and SMTP, and encrypts data using SSL.

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]

Stunnel FAQ - Frequently Asked Questions
Where to get the software, how to install and run it, and troubleshooting tips.