IETester is a free Web Browser that allows you to have the rendering and javascript engines of IE 8, IE 7 IE 6 and IE 5.5 on Vista and XP (work on Windows 7 is in progress), as well as the installed IE in the same process.
You don’t have to have installed all versions of Internet Explorer separately on your system to check web project you are working on. Now, IETester is able to give you necessary information at one place. You can open IE 5.5, IE 6, IE 7 or IE 8 in the same window in separate tabs like websites in other web browsers. IETester is extremely useful tool and is a must of every web developer!
Quite a good program, hovever I found some issues with JS. Let me know guys if its OK on your side.