AdBlock - Ad blocker for Chrome, Safari and Opera on desktop and Safari for iOS devices.
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.
Bromite - Bromite is Chromium plus ad blocking and privacy enhancements; take back your browser!
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
BLOCK THIS! - Block This 3.0 is a FREE and Open Source ad blocker for Android that works in all apps and browsers!
Better Uptime - We call you when your website goes down