An eye on your system
Enhanced Apache Server Status page - for one or multiple servers
Stream manager
ipset set listing wrapper script
Webbased Dashboard to show the status of your IT infrastructure
Monitor your GNU/Linux server with your smartphone
Monitoring of websites with spider and email notifications
Is your host up or down?
A free SYSLOG Client
Stormons is a powerful SAN mapping and monitoring program
SNMP adaptor for JMX.
NDPMon - Neighbor Discovery Protocol Monitor
GUI Frontend to BBWin XYmon Monitoring Agent