IE Tester
Browser Compatibility Check for Internet Explorer Versions from 5.5 to 9
FEATURES
IE Tester is a free WebBrowser that allows you to have the rendering and javascript engines of IE9 preview, IE8, IE7 IE 6 and IE5.5 on Windows 7, Vista and XP, as well as the installed IE in the same process.
Requirement : Windows 7, Windows Vista or Windows XP with IE7 minimum (Windows XP/IE6 config has some problems and IE8 instance do not work under XP without IE7)