nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
A flexible & easy-to-manage web server... Internet Information Services (IIS) for Windows® Server is a flexible, secure and manageable Web server for hosting anything on the Web. From media streaming to web applications, IIS's scalable and open architecture is ready to handle the most demanding tasks.
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
A rich hosted Exchange environment for every user without having to manage a server.