Apache HTTP Server is described as 'Apache, is a web server notable for playing a key role in the initial growth of the World Wide Web and in 2009 became the first web server to surpass the 100 million web site milestone. Apache was the first viable alternative to the Netscape Communications Corporation web' and is a very popular Web Server in the development category. There are more than 50 alternatives to Apache HTTP Server for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and BSD apps. The best Apache HTTP Server alternative is nginx, which is both free and Open Source. Other great apps like Apache HTTP Server are Caddy, Ferron, BunkerWeb and lighttpd.
Programming library containing server functionality