The Content Manager Explorer (CME) is the main user interface to the SDL Tridion Content Manager
Using a familiar "Windows Explorer"-like look and feel for browsing content items, and an also familiar Ribbon Toolbar, the Content Manager Explorer is the main user interface for content editors to work with Tridion.
Built with the new anguilla framework, the SDL Tridion 2011 Content Manager Explorer supports various extension points for implementers - from additional buttons, to tabs, to rich text editor extensions, nearly everything can be controlled from Javascript.