Microsoft Expression Web 4 is a visual debugging tool for web developers which can display the URL of your choice as though it was rendered by IE6, IE7, IE8, IE8's compatibility view and Firefox 3.6.

And if you subscribe to Microsoft's SuperPreview online service beta (just a matter of submitting and confirming your email address) then you'll also gain the ability to render pages in IE9, Safari 4 and 5 on the Mac, and Chrome, very useful for confirming that your sites display correctly for just about everyone.

Microsoft Expression Studio 4 Ultimate is a suite of applications that enables you to design and build both web and Windows desktop applications.

The suite includes Microsoft Expression Web, a professional web design tool with in-depth support for HTML, CSS, JavaScript and PHP. Drag and drop controls allow you to add Silverlight, Flash, DeepZoom or Windows Media files with ease. And when you're finished, the program can put your files online via FTP, SFTP or FTPS, or even directly edit files on the server for extra speed.