Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Cold Turkey - Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Freedom.to - Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Stay Focused - More suitable with Google Chrome, this service enables you ensure you do not waste precious time on updating Facebook status or chatting with people.