Open source tool to monitor your servers and websites
PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your services and websites, and you can manage users for each server with a mobile number and email address.
For services a connection will be made to the entered ip or domain, on the given port. This way you can check if certain services on your machine are still running.
Monitoring of websites with spider and email notifications
Free website monitoring software, easy to setup and use for monitoring web sites. It is a web application programmed in Java programming language. You can monitor HTML pages, JSON and XML, pages in sitemap and even your whole web site using spider. Naturally you can check multiple websites. You can check HTTP result codes and even contents of the checked pages.
Website checking is done periodically using build-in cron mechanism.