watchdog is a daemon that monitors systems processes and loads, and will automatically reboot a server if the load rises above a defined level. Very useful tool.
You can download it from the following link: https://packetstormsecurity.com/files/download/12871/watchdog-4.4.tar.gz
Source: https://packetstormsecurity.com/files/12871/watchdog-4.4.tar.gz.html