IETester is a multiprocess application that allows us to open a website and simultaneously visualize it with different versions of Internet Explorer on the same web browser, opening each visualization in a different tab.
All we have to do is load the website that we want to check and choose what editions of IE we want to view it with. There is even an option to render the web with all the browsers at the same time.
All in all, IETester is an essential tool to make the work of website programmers a lot easier. With this application they will be able to check the sites developed with different editions of Internet Explorer: IE8, IE7, IE6 and IE5, since each tab of the browser will render the web using the corresponding engine.