Speedtest by Ookla - Measure your ISP's performance in a click
Website Image Speed Test - Beautiful & easy free analysis of the images on your page
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
Pingo - Optimize images for the web quickly 🖼️⚡
Meteor - Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.
Dither Me This - Reduce image file sizes in a stylish old-school way.