Every installation of Internet Explorer 8 (download) comes with the Developer Tools. This tool enables Web site developers to quickly debug Microsoft JScript, investigate a behavior specific to Internet Explorer, or iterate rapidly to prototype a new design or try solutions to a problem on-the-fly. Great tools play a critical role in developer productivity, and while many web development tools exist, they likely don't meet your needs in all tasks. For example, you may want to quickly debug JScript, investigate a behavior specific to Internet Explorer, or iterate rapidly to prototype a new design or try solutions to a problem. This MSDN article introduces you to key features of the Developer Tools.