1. Phusion Passenger is a multi-language (Ruby, Python, Node) web & app server which can integrate into Apache and Nginx

  2. WildFly is a flexible, lightweight application server.

  3. Apache ZooKeeper is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination.

  4. IBM WebSphere Application Server provides flexible Java EE 7 runtime environments available on premises or across any public, private cloud.

  5. Zend Server offers software infrastructure, tools, and best practices for development and operation teams.

  6. Internet Information Services is a web server for Microsoft Windows

  7. An open source software implementation of the Java Servlet and JavaServer Pages technologies

  8. Apache httpd has been the most popular web server on the Internet since April 1996

  9. LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.

  10. Static web hosting made simple

  11. Jetty is a highly scalable modular servlet engine and http server that natively supports many modern protocols like SPDY and WebSockets.

  12. MAMP is the abbreviation for Macintosh, Apache, MySQL, and PHP. It is a reliable application with its four components that allows you to access the local PHP server as well as the database server (SQL).