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.
SelfRestraint - If you find yourself constantly ending up on distracting websites, you know what a time sink your...
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Time Sink - Time Sink helps you track how you spend your time on your Mac.
Better Uptime - We call you when your website goes down
Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.