Topt said

IETester - IE8 beta 1, IE7 IE 6 and IE5.5 on Vista and XP

IETester is a free WebBrowser that allows you to have the rendering and javascript engines of IE8 beta 1, IE7 IE 6 and IE5.5 on Vista and XP, as well as the installed IE in the same process.
New in v0.2 : IE7 and IE8 beta 1 added !

This is an alpha release, so feel free to post comments/bugs on the IETester forum or contact me directly.
Minimum requirement : Windows Vista or Windows XP with IE7 (Windows XP with IE6 has some minor problems and IE7/IE8 instances do not work under this config)

Download IETester v0.2

Known problems and limitations :

• When resizing, the content may disappear. I am working to correct it on the next version.
• The Previous/Next buttons are not working properly
• Focus is not working properly