lighttpd - A secure, fast, compliant, and very flexible web-server that has been optimized for high-performance environments
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.
Hiawatha - Hiawatha, a secure and advanced webserver
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Caddy - The HTTP/2 Web Server with Automatic HTTPS