1. tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page

  2. A Marvelous Open Source Status Page System

  3. Status Pages with integrated Website Monitoring - All in one package.

  4. Create your professional status page in minutes, free.

  5. Better status pages in 1-click, FREE FOREVER

  6. "Is It Down Right Now" monitors the status of your favorite web sites and checks whether they are down or not.

  7. SPFtoolbox is a Javascript and PHP app to look up DNS records such as SPF, MX, Whois, and more

  8. A secure cloud management platform for automation, orchestration, cost and usage monitoring of public and private clouds. Provides multi-cloud RBAC. Enables self service provisioning. Cost analysis and cloud spending optimization

  9. Free open-source website monitoring software, easy to set up and use for monitoring web sites.

  10. SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.

    freemium $6.95 / Monthly (5 Servers, 25 Monitors, 30 day retention)

  11. All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.

  12. Free Website Uptime Monitoring