Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
nginx - A high performance free open source web server powering busiest sites on the Internet.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
mini_httpd - mini_httpd is a small HTTP server for low or medium traffic sites.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Droopy - Droopy is a mini Web server whose sole purpose is to let others upload files to your computer.