MonoRail, a component of the Castle Project, is an open source web application framework built on top of the ASP.NET platform. Inspired by Ruby on Rails Action Pack (External Link), MonoRail differs from standard ASP.NET WebForms development by enforcing separation of concerns using a model-view-controller (MVC) architecture. The framework is commonly used in conjunction with Castle ActiveRecord, an ORM layer built on NHibernate. Although last official release is from 2007, the project is activ… (More on Monorail)