Welcome to Webmonitor.ie
WebMonitor.ie is a popular free open-source webmonitoring and alerting engine. It includes an automated email alert system, and full uptime history and graphical uptime statistics. It is written in PHP and uses MySQL as its back end database (requires version 4 or above for both).There has been no additional development work done on this software (since 2008), however that might change if i get some free time.