CompositeC1CMS is a fully functional free and open source website content management system, focusing on the development of corporate websites. is a very practical and task-oriented user interface that enables users with different skill sets to complete tasks and collaborate using familiar tools and wizards. Building a website using CompositeC1CMS does not require high-end technical content, but if you master these skills, you will be more comfortable using CompositeC1CMS. Developers can manage layouts and extend system functionality through ASP.NET Razor, MVC, Web Forms, and XSLT. Back-end and front-end developers are highly empowered and able to control the appearance and subtleties of the website. The latest technology developed based on .NET4, well-designed pluggable architecture and API and complete LINQ data access and its disposal access, make it a flexible system, easy to install, easy to migrate to Windows Azure, both File-based and SQL Server data support, many free easy-to-install add-ons and value-added services set up. So far, all major versions of CompositeC1CMS have been voted "Best CMS" by CodePlex users.