Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
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.
Hitsteps - Hitsteps provides tools is a tool offering web analytics, live chat and page analysis.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Clicky - Clicky Web Analytics is a simple way to monitor, analyze, and react to your blog or web site's traffic in real time.
Better Uptime - We call you when your website goes down