CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
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.
Revenera - The enabling technology to take products to market fast, unlock the value of your IP and accelerate revenue growth – from the edge to the cloud.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
ManageEngine ADAudit - ManageEngine ADAudit is a real-time windows active directory auditing tool.
Better Uptime - We call you when your website goes down