Fast.com - Quickly test your internet speed with this fast-loading speed test powered by Netflix.
Website Grader - Grade your website's strengths and weaknesses in seconds.
LibreSpeed - Self-hosted Speedtest for HTML5. Easy setup, examples, configurable, mobile friendly.
Smaller - Make your websites load faster
speedtest-cli - Test your download speed using SpeedTest on the command-line
Textalyzer - Analyze text readability and SEO parameters