Mac Web Server is a robust http server and http file server for the Mac mainly designed for 2 purposes: Publish websites right from your Mac to the open Internet, and test websites before putting them into production.
Website: http://www.pcwinsoft.com/mac-web-server.asp
Giveaway: link
Mac Web Server gives you the power to publish websites right from your Mac out to the open Internet. For that you will need to do a port forward on your router to enable users on the Internet to connect to your website or websites. Mac Web Server supports OS level authentication and you can protect your website or websites with credentials.
If you desire to test websites before putting them into production Mac Web Server is ideal as it supports multiple websites simultaneously allowing you to test mutltiple versions at the same time.
