Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Jackmail - A newsletter plugin for Wordpress.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Wordfence - Comprehensive security plugin for WordPress.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996