Icinga is a monitoring software project that began as a fork of Nagios. With Icinga and Icinga 2 the Icinga Project maintains two branches in parallel.
This project contains everything related to Icinga 1.x. Look for 2.x below:
Icinga 2: https://www.openhub.net/p/icinga2
Icinga Web 2:
... [More] https://www.openhub.net/p/icingaweb2
Vagrant Boxes: https://www.openhub.net/p/icinga-vagrant
Puppet Modules: https://www.openhub.net/p/puppet-icinga2 & https://www.openhub.net/p/puppet-icingaweb2
Chef Cookbooks: https://www.openhub.net/p/chef-icinga2
Ansible Roles: https://www.openhub.net/p/icinga2-ansible [Less]
OpenNMS is the world's first enterprise grade network management platform developed under the open source model. It consists of a community supported open-source project as well as a commercial services, training and support organization.
Pandora FMS is a monitoring software which helps you to detect problems before they happen, managing your IT infraestructure: servers, networking and applications.
Pandora FMS - F is for "Flexibility", if something has information, Pandora can grab it.
Nice GUI with Ajax/HTML interface. Nice
... [More] integrated reports and graphs, and very nice management. Very high scalability (up to 2500 monitored servers with a single monitoring server) and excellent documentation (800 page manual in Spanish, English and Japanese).
23 developers from different countries in eight years. That's Opensource ! [Less]