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.
Metronomus - Powerful and beautiful online metronome
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
afractal Metronome - Highly perfomant, easy to use, minimalistic digital metronome desktop app.
Better Uptime - We call you when your website goes down
TempoPerfect Metronome - TempoPerfect is a free software metronome.