The "C# !WebServer" is an open source, web/application server that runs on both DotNet and NovellMono. It is packaged as a library and through a series of calls, you can set up various components such as an !HttpListener, sessions, file serving, redirect rules, etc. It's very modular.

 * http://www.codeplex.com/webserver
 * [http://cobra-language.com/forums/viewtopic.php?f=4&t=373 Cobra discussion]

See also: WebDevelopment