Umbraco CMS System
Umbraco is an open source CMS platform built
on top of ASP.NET, and allows the web site owner to manage their
web site content from a familiar WYSIWYG (what you see is what you
get) administration backend.
Umbraco has been used to power at least 75,000
web sites built by its dedicated community. These range
from simple blogs to complicated and dynamically generated
Umbraco appeals to designers, developers and
editors alike, as it provides a comprehensive API and a multitude
of extension capabilities.