As a web developer you need to create web pages that work in all browsers and even multiple versions of each browser and in particular Internet Explorer. Unfortunately Windows will only allow you to use the current version of Internet Explorer installed on your computer.  However there are solutions.

Solutions:

• IETester by DebugBar.com (My Pick – Best)
• Internet Explorer Download Archives by evolt.org
• Install multiple versions of IE on your PC by TredoSoft (Won’t Work with Vista)
• Official Solution from Microsoft
  

Articles:

• Test Web pages in multiple browser versions by TechRepublic
• Taming Your Multiple IE Standalones by Position Is Everything

If you know of any other solutions, please leave a comment.