Hevea is a dotnet (C#) Web/HTTP/Web service & FTP application server. Included in your application, it provides you remote access & data transfer facilities, avoiding any integration/deployment issues you would have by using an external server like IIS.
http.net is a dirt simple HTTP server written in C#. It supports minimal functionality and is primarily intended as example code for software-related courses, whether those courses cover system testing, unit testing, TDD, .NET fundamentals, or other rela