http://www.stunnel.org/
Stunnel is an SSL wrapper or proxy which can encrypt any TCP traffic on Unix / Linux and Windows. It can be used to encrypt any TCP transaction (http, smtp, pop3, imap, etc).
http://www.apsis.ch/pound/
Pound is a reverse proxy, load balancer and HTTPS front-end for Web server(s). Pound distributes the the load among several Web-servers and allows for a convenient SSL wrapper for those Web servers that do not offer it natively.