WebMatrix includes a complete Web development stack that integrates a Web server (IIS Developer Express), database (Microsoft SQL Server Compact 4.0), programming model (ASP.NET Web pages with Razor syntax), and a tool (WebMatrix Beta) into a seamless experience.  You can use WebMatrix to streamline the way you create an ASP.NET Web site from templates, or by starting a new Web site by using the world’s most popular free and open source (ASP.NET or PHP) apps like DotNetNuke, Umbraco, WordPress, or Joomla!. With WebMatrix you can code your Web sites, customize them, optimize them for good search engine ranking, test them, and deploy them to an Internet hosting company, all through the tool.

Learn more about WebMatrix through:

http://www.microsoft.com/web/webmatrix/learn/