IP Monitor notifies you when your public IP address changes
Monitoring of websites with spider and email notifications
Poll JMX attributes from Java based applications with Nagios
Analyze the network carateristics like Delay, Jitter, Packet loss etc.
RanMon is a program that provides you with a way to internet monitor
HTTProvjera is a program that provides you with a way to web monitor
SNMP adaptor for JMX.
Sniffs Packet on lan
The Energy Sensing and Monitoring Infrastructure of the GAMES project