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.
History Search - History Search remembers what's on all those websites you visit so you can find them again.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Better History - Your Chrome Browsing history. Better.
Better Uptime - We call you when your website goes down
Ruin My Search History - Ruin your Google search history with a single click