This page provides links to resources useful in the testing and development of web-sites in general and have either been found to be beneficial for THL development or are believed to be so.
DynaTrace: A stand-alone program that allows one to record a session with a website, analyzing the speed of its JS, AJAX and image downloading in order to debug bottlenecks slowly down the site.
Fiddler: A Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data.
Firebug Add-on for Firefox: An add-on to Mozilla's Firefox that provides extensive tools for debugging websites on Firefox, including Javascript console code, DOM browser, ect..
IE Tester: A toolbar plug-in for IE that allows one to test pages in various versions of IE.
Web-Developer Add-on for Firefox: An add-on to Mozilla's Firefox that provides extensive tools for web-development in Firefox, including interactive editing of CSS for a page, ability to view cookies, highlight form, images and so forth.