Testing browser compatibility can drive any Web developer postal, especially when it comes to Internet Explorer. While there are multiple ways to install different versions of a browser on one computer, it's a headache waiting to happen. Thankfully, there are several solutions to this problem today, and a service from Code Systems is one of the most seamless ones we've come across so far.
The Spoon Browser Sandbox offers 11 different Web browser builds, including IE 6, 7, and 8, Firefox 2, 3, and 3.5, Safari 3 and 4, Opera 9 and 10, as well as Google Chrome. All of these run securely and don't require installation.