Orchard - Re-usable components in ASP.NET helps to build CMS

Orchard is a Web CMS, which essentially aims at helping you build web sites from existing pieces. It could manage multiple web sites. Each site could have multiple pages and each page could have multiple custom zones. Blogs could be created and managed and archived. Comments could be added for contents and it is spam protected. Tags could be associated to the content to get locate and categorize the content.

It does better page creation using WYSIWYG editor. It has support for file management, Users and their roles and access management, Reporting, Multi lingual support, UI theme support, Email notification and lot more. The content could be indexed and available for search.

It provides a set of re-usable components that makes it easy to build such CMS kind of applications.
Source code location: http://orchard.codeplex.com/