IETester it helps site owners or designers to test a website in different versions of Internet Explorer. That was many problems with different IE versions and there are many differences how CSS is interpreted in IE versions. Is good to check website on each version of IE.
Users can test using different operating system versions: Windows 8, 7, Vista, XP and test how a webpage is rendering in IE10, IE9, IE8, IE7 IE 6 and IE5.5.
There are some minor bugs on the interface if page have Javascript, but the application is making his job to test website and have a look or idea about what users that are using this browser are seeing when visiting the site.