Suprvise is a real-time health monitoring and errors tracking dashboard.
Website Grader - Grade your website's strengths and weaknesses in seconds.
WebGazer - Monitor your website's availability with WebGazer, review its performance and get instant notifications when your website goes down. No installation required and free plan available.
Smaller - Make your websites load faster
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Treo - Treo is the page speed monitoring tool that helps your customers from obtaining a faster web experience.
Oh Dear! - Website monitoring, without the hassle