A web CMS that focus on UX and adaptability

UPDATE: We have moved the source code to GitHub!





Install Composite C1 via WebMatrixComposite C1 CMS is a fully featured free open source web Content Management System developed for (and by) web professionals who focus on customized websites and content.

Getting started with Composite C1

The user interface is very functional and task oriented and enables users of varying skills to effectively complete tasks and cooperate using familiar tools.

Composite C1 is very end-user friendly and easy to navigate and use when editing content.

The Editor and Developer UI runs in all the major browsers on Windows and Mac OS. The user interface is available in English, German, Chinese, Russian, Swedish, Ukrainian and Dutch.

Developers can manage layouts and extend the system using any choice of ASP.NET Razor, Web Forms, MVC and XSLT. Like the back-end developers, front-end developers are highly empowered and able to control website look and feel down to minute detail.

With the system being based on .NET 4 developers have access to the latest technologies, a pluggable well designed architecture & API and full LINQ data access.

High-end technical skills are not a requirement to build websites with Composite C1, but if you've got them, you will pwn the system.

This is a flexible system with easy setup, easy Windows Azure migration, both file based and SQL Server data support, a lot of free easy-to-install add-ons and a set of premium offerings (corporate website add-ons, support, upgrade services, full warranty licensing). All of this makes Composite C1 a customizable and scalable product, in terms of price, service and freedom.

A very strong emphasis on quality, documentation, flexibility and developer community.

Getting Started

User Guides and Help

Responsive Forum

Composite C1 Product Website

Developer documentation

Install now with WebMatrix - wheee!

Lovely Community Contributions

 C1 Packages, Source Code


Twitter (techy)


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Last edited Oct 30 at 8:23 PM by mawtex, version 97