CDNPerf - CDN performance and uptime statistics
Website Grader - Grade your website's strengths and weaknesses in seconds.
Needl Analytics - Analytics as automated insights
Smaller - Make your websites load faster
Metric.live - Real-time and advanced periodic alerts for Google Analytics.
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.