IETester

IETester is an application aimed at web developers that allows you to check and see if the page you're building will be viewed correctly from different versions of Internet Explorer. IETester includes definite rendering and javascript engines for Internet Explorer 5.5, 6, and 7, as well as a beta version of Internet Explorer 8. IETester allows you to open each version of Internet Explorer in a different tab, so you can quickly and easily see any changes. The program's interface itself is similar to Microsoft Office.