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.
Huje Tower - Huje Tower is an Action and Single-player video game.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
World of Goo - get it here | read the blog | forum.
Better Uptime - We call you when your website goes down
Prune - Prune is a Puzzle and Single-player video game that is developed by Joel McDonald.