A big headache for web developers is testing websites in different versions of Internet Explorer. In Windows you can only have one copy of Internet Explorer installed.
To get around this limitation, some developers use IECapture which takes a screenshot of your webpage in Internet Explorer. It’s great for a quick test but it’s impractical during development: you can only see part of the page and if doesn’t help you debug anything.
Another option is to use Microsoft’s virtual machine or the Standalone IE program.
A little application called IETester can simplify the process. It features the rendering engines for IE 5.5, IE 6, IE7 and IE8. You can open up a tab for each rendering engine, hence switching between different rendering engines seamlessly. It also allows you to split the view and to see your website in the different rendering engines at once.
An interesting user interface design too… An odd blend of Firefox 2 icons with an Office 2007 ribbon.