Website Speed Ranker - Compare how fast your website loads vs your competitors
Speedtest by Ookla - Measure your ISP's performance in a click
Textalyzer - Analyze text readability and SEO parameters
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
SanityCheck - Get the exact data you need from Google Search Console.
Meteor - Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.