Radio Silence - Radio Silence is a network monitor and firewall for the macOS. The software stops apps from making network connections. The firewall runs in the background and does not require an open window.
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.
LaunchBar - Start with a single keyboard shortcut to access and control every aspect of your digital life. Use LaunchBar and improve your workflow now.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Application Monitor - Application Monitor is a program that constantly checks the processes previously chosen by the...
Better Uptime - We call you when your website goes down