http://owin.org/ lists Kayak under "Out of date or deprecated".
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
- Kayak-http Google Group
- Cobra discussion
See also: WebDevelopment