Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Neopets - Neopets is an Amazing, Virtual World, Massively Multiplayer Online, Role-playing and Fantasy-based video game developed and published by Viacom.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Toontown Rewritten - Toontown Rewritten is a Free to Play, Browser-based, MMORPG, and Virtual-World video game developed and published by Disney.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Webkinz - Webkinz is an Animal-based, Virtual Children’s World, Fantasy and Browser-based Simulation developed by Ganz.