CleanMyMac X - Clean, protect and speed up your Mac
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.
MacKeeper - The new MacKeeper app delivers multilayered protection from malware, online threats, and identity theft & Mac performance optimization. Learn what is MacKeeper.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
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.
Better Uptime - We call you when your website goes down