Monitoring of websites with spider and email notifications
...You can check HTTP result codes and even contents of the checked pages.
Website checking is done periodically using build-in cron mechanism. In case of a check failure, application will automatically send email to site administrator.
Monitoring tool with support to Websites, RSS, Webservices and Databases. Has notifications by email and RSS and you can access metrics like availability, latency and load time by a web-based GUI. Runs standalone with an embedded HTTP server.