the text below has been stolen from mini_httpd's web site ;-)
mini_httpd is a small HTTP server. Its performance is not great, but for low or medium traffic sites it's quite adequate. It implements all the basic features of an HTTP server, including:
It can also be configured to do SSL/HTTPS and IPv6.
mini_httpd was written for a couple reasons. One, as an experiment to see just how slow an old-fashioned forking web server would be with today's operating systems. The answer is, surprisingly, not that slow - on FreeBSD 3.2, mini_httpd benchmarks at about 90% the speed of Apache. The other main reason for writing mini_httpd was to get a simple platform for experimenting with new web server technology, for instance SSL.
Get mini_httpd here: http://www.acme.com/software/mini_httpd
Please take notice that these guys worked hard for a free product. Consider making a small donation when you find their software useful.