StatusMon – Service monitoring script
Features
* Monitor services on your server(s) and be alerted when a services fails or is started.
* Monitor multiple servers
* Full control over what ports to monitor (on a per server basis)
* Multiple email address notification options
* Completely FREE to use
* Report past uptime history
* Full admin interface for all settings
DF™ Site Monitor – is a system for monitoring web sites. The system allows monitoring the availability of web sites and their content by checking whether the given content exists or does not exist on the site. The system can be used autonomously or as a module for other systems.
phpWatch is a flexible service monitoring system. Features include multiple contact methods for when services malfunction, multiple query methods, statistics gathering, and a fully extendable architecture for developers.