WhoisUP monitors hosts via ICMP and shows the status in a web page. When a host is down, the script can send mail, syslog message, open a popup message or play a sound. WhoisUP is useful to monitor hosts (PC, Server, NAS, Router, Switch and so on...) and to receive alerts when a host go down. The script uses NMap ...

Limph Is Monitoring Pingable Hosts. Written in PHP(multi-DB) for portability. Limph provides ICMP, UDP, TCP and agent checks of grouped network hosts with email notification. Limph is completely web-configurable, an advantage over similar applications.