IETester: multiple IE rendering engines

IETester is a free webbrowser that allows you to have the rendering and javascript engines of IE8, IE7 IE 6 and IE5.5 on Vista and XP, as well as the installed IE in the same process. This is more of a tool for the folks out there building web sites, but if you want a bit more robust method of testing your designs against different IE browsers without using websites like NetRenderer or BrowserShots. IETester is not modifying the user agent string in any way. This is the real user agent string regarding the instance used in the tab. So, when opening an IE6 tab you will have IE6 user agent string, same for IE5.5 and same for IE7 (the default).

IETester
IETester

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