Speedtest by Ookla - Measure your ISP's performance in a click
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
Meteor - Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.
Loader.io - Loader.io is a simple cloud-based load testing service
speedtest-cli - Test your download speed using SpeedTest on the command-line
LoadFocus - Cloud Testing Infrastructure | Cloud Testing Services and Tools for Websites & APIs.