ChangeDetect
Service that saves favorite web pages, monitors content, and sends an automatic email notification when a web page change is detected.

Change Detection
Service that notifies visitors about web page changes.

Hosted Cron
This site can help you with the automation that programs need most, a scheduling system that automatically runs the maintenance and cleanup scripts when you need them run, 24 hours a day, 7 days a week, 365 days a year.