Instant Beautiful Browsing (IBB) is an application that will bring Windows 8 Metro UI on your Windows 7 operating system. You will be able to use Metro Workspace which brings a lot of new stuff: weather application, clock, new browser, windows store etc.
After installation, Instant Beautiful Browsing can be easily accessed from a desktop shortcut just like any other application. It takes over your computer screen and replaces the stock Windows 7 interface with the beautiful Metro UI.
Download Instant Beautiful Browsing
Note: that Instant Beautiful Browsing is under development and some of the tiles and options might be buggy at the moment. You can also check out how to get Windows 8 style Metro start screen in Windows 7 using Metro7.