Le plus sérieux :
http://www.codeplex.com/webserver This project is a flexible http server which can be embedded in any .Net application. It has a modular design where features are added using modules.
http://www.codeplex.com/webserver/SourceControl/FileView.aspx?itemId=203539&changeSetId=%2017998

Sinon
Embedded .Net HTTP Server The server supports session management (through cookies), switching folders based on the host requested (running multiple domains on the same IP), keep-alive connections, and, through the request handler which is provided, serving files from disk with substitution of pseudotags for dynamic content

Using InsomniaServer to Build a Web-interface for your Application

http://www.codeproject.com/KB/IP/CSHTTPServer.aspx
A reusable, high performance, socket server class – Part 2

Sondage sur les AC vraiment nécessaires pour le SSL :
http://netsekure.org/2010/05/results-after-30-days-of-almost-no-trusted-cas/