For a long time PHP has been the uncontested leader of open source technologies. But Microsoft has stepped up the ante. The leader is facing mighty competition from some Dotnet based open source technologies. Orchard is one such CMS making waves in open source.
Orchard is an ASP.Net MVC framework based content management system. Popularly referred to as Orchard Project, it brings together a whole community of Dotnet based open source developers. This community works on the development of reusable and versatile repository of Asp.Net components.