1. Website Protection, Managed Website Security & Website Monitoring

    paid Free Trial $14.99 / Monthly

  2. Update Scanner is a Firefox extension to monitor web pages for updates.

  3. IP/Domain Blacklist Monitoring & Uptime Monitoring made easy!

  4. WebMon is a freeware web page update monitoring program - it saves you time and keeps you updated...

  5. Complete monitoring and alerting for servers, switches, applications, and services

  6. Monitor your cron jobs and scheduled tasks, get notified when they fail.

    freemium $20.0 / Monthly (100 checks, 10 team members)

  7. IntoDNS checks the health and configuration and provides DNS report and mail servers report.

  8. Kace provides endpoint systems management appliances and solutions.

  9. Status page, monitoring and on-call made simple.

  10. GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.

  11. An intuitive website monitoring tool. You get: 25 monitors, checked every 3 minutes. Totally free!

  12. A Marvelous Open Source Status Page System