WebPagetest : Run a free website speed test from multiple locations around the globe using real browsers (IE and Chrome) and at real consumer connection speeds.
Skipfish : Skipfish is an active web application security reconnaissance tool. It prepares an interactive sitemap for the targeted site by carrying out a recursi...
WebScarab : WebScarab is a framework for analysing applications that communicate using the HTTP and HTTPS protocols.
SPOFCheck : A CLI tool for detecting frontend SPOF, mainly blocking scripts and CSS
The coach helps you find performance problems on your web page. Think of the coach as a modern version of YSlow. The coach will give advice of how your page can be faster.