www.netxms.orgNetXMS — Open Source Monitoring System
www.nagios.orgNagios is the industry-standard in IT infrastructure monitoring. Nagios provides enterprise-class Open Source monitoring of hosts, services, applications, and networks. Learn why organizations around the world trust Nagios to handle their IT infrastructure monitoring and business process continuity.
www.hyperic.comWorld's most popular open source systems monitoring, server monitoring, and IT management software. Developed for web apps and service provider scalability. Take a FREE test drive.