Orchard Project is in active community-driven development and includes both modules and themes and all of the developers work for Microsoft.
Orchard is a free, open source, community-focused content management system written in ASP.NET platform using the ASP.NET MVC framework. Its vision is to create shared components for building ASP.NET applications and extensions, and specific applications that leverage these components to meet the needs of end-users, scripters, and developers. Although several of primary developers work for Microsoft, it is no longer an officially developed Microsoft product, and is under the auspices of the .NET Foundation. 
