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.
CleanMyMac X - Clean, protect and speed up your Mac
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
MacKeeper - The new MacKeeper app delivers multilayered protection from malware, online threats, and identity theft & Mac performance optimization. Learn what is MacKeeper.
Better Uptime - We call you when your website goes down
Ambeteco MyQuickMac Neo - MyQuickMac Neo organizes, optimizes, speeds up, declutters, cleans, and cares about your Mac, fully automatically, using innovative algorithms and Artificial Intelligence to deeply analyze and optimize macOS from its core.