A few days back, we released our Metro UI Tweaker for Windows 8 which allowed you to tweak a few Metro UI settings in Windows 8. Now if you'd like to switch between the Windows 8 style start menu and Windows 7 style classic start menu, you can do so in a click, with the help of this desktop gadget.
Windows8 Start Menu gadget for Windows 8 makes it easy for you to effect the change. In one click you will able to change from the Windows 8 start menu to the Windows 7 start menu and vice versa.
You can also change its backgrounds - there are 5 color option available.
Download it at CodePlex if you'd like to check it out.
Go here to check out some more freeware to add Start Button to Windows 8.