Monitoring

• http://www.nagios.org/
• http://munin-monitoring.org/
• http://www.zenoss.com/
• http://www.splunk.com
• http://www.pagerduty.com (Send SMS or Phone call notifications from almost any monitoring software)
• https://scoutapp.com
• http://www.logicmonitor.com
• http://www.compuware.com/application-performance-management