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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.
2016 Photo Challenge - Take a photo every day for 366 days
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Woolah - Knockout Photo challenges with your friends.
Better Uptime - We call you when your website goes down