speedtest-cli - Test your download speed using SpeedTest on the command-line
Website Speed Ranker - Compare how fast your website loads vs your competitors
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
Textalyzer - Analyze text readability and SEO parameters
Speedtest by Ookla - Measure your ISP's performance in a click
SanityCheck - Get the exact data you need from Google Search Console.