Spread.Net is an Open Source CMS built on top of IoC pattern (using Windsor) to facilitate decoupling and therefore extensibility. It's first of all a framework for building entity based web apps that need to enforce workflows and implement logic.
The Official port of the STUNNING! CMS/CMFx "Drupal" to the .NETFramework. Combining The greatest open source CMS with the greatest development platform. It will have the same architecture and will support Drupal modules & themes out of the box.