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.
Spoon University - Food network for next generation.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Simmer (formerly Foodie) - Yelp, but for every dish on the menu
Better Uptime - We call you when your website goes down
Sidecook - Airbnb for personal chefs