Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Website Grader - Grade your website's strengths and weaknesses in seconds.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Textalyzer - Analyze text readability and SEO parameters
Better Uptime - We call you when your website goes down
Smaller - Make your websites load faster