UltiDev
UltiDev Web Server Pro (UWS), also known as UltiDev Cassini Pro, is an an advanced, redistributable web server that can be use as a regular web server to host web sites and ASP.NET applications, or packaged with your web application and installed on your customers' systems along with your web app or site, free of charge. Unlike Cassini or WebDev web servers, UWS is not a toy - UWS is a real deal.