"GTmetrix uses Google Page Speed and Yahoo! YSlow to grade your site's performance and provides actionable recommendations to fix these issues."
"Show Slow is an open source tool that helps monitor various website performance metrics over time."
"Website speed test from multiple locations around the globe using real browsers"
"OctaGate SiteTimer aims at web site developers that needs to get a birds eye view of their work."
"Testing everybody's browser"
"Load testing and reporting as an online service"
"Test the Load Time of a Web Page"
"A quick and easy way to get performance data on any website without having to create a test script."
"The website speedtester shows the duration of a given website. This value can be used for showing how long a website take to load and if it is better to optimize the website or change a (slow) ISP"
"Make your web site faster"