WebMatrix is a new web development tool from Microsoft. Starting from open source web apps, built-in web templates. Itís all-inclusive, simple and best of all free. With this you can creat and customise websites along with the free services like WordPress, Joomla!,
DotNetNuke and Orchard. Its features includes integration with Visual Studio, rich code editor, a database editor, Web server management, Search Engine Optimization, FTP publishing and also integrates with IIS Express.

you can download and check it here : WebMatrix