Website Image Speed Test - Beautiful & easy free analysis of the images on your page
Speedtest by Ookla - Measure your ISP's performance in a click
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
Smaller - Make your websites load faster
Meteor - Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.