Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Cherokee - High-performance web server
nginx - A high performance free open source web server powering busiest sites on the Internet.
Caddy - The HTTP/2 Web Server with Automatic HTTPS
vCenter Server - IaaS platform for managing and deploying virtual machines