Free Web Server Monitoring Tools

1. Monpage

2. PA Server Monitor

3. ServiceUptime

4. Site24x7

5. Are My Sites Up?

6. Livewatch.de

7. FreeSiteStatus

8. Observu

9. Pingdom

10. Montastic

11. Mon.itor.us

12. Host-Tracker

13. BasicState

14. Free Network Monitor

15. Uptrends