The "Kayak Web Server" is an open source, web/application server that runs on both DotNet and NovellMono. It is packaged as a library so that through a series of calls, you can set up various components for serving HTTP, HTML, JSON, etc.

•  http://kayakhttp.com - home page
•  The Kayak Framework - introductory article
•  Cobra discussion

See also: SharpWebServer, WebDevelopment