Reflection - Market insights for app developers
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.
Purp - A smart to-do list and goal tracker app
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Stratagem - Build your best life.
Better Uptime - We call you when your website goes down