ClearLock - A transparent screen locker.
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.
BlueLife KeyFreeze - FREE Windows application that blocks your keyboard and mouse without “locking” the screen.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
VBLock - Converged Infrastructure
Better Uptime - We call you when your website goes down