System monitoring solutions

1. Inventory Management - OCS Inventory NG + GLPI (OpenSource)
A. OCS Inventory NG
http://www.ocsinventory-ng.org/
B. GLPI - Gestionnaire libre de parc informatique (Free IT and Asset Management Software)
http://glpi-project.org/spip.php?lang=en


2. System/Network Monitoring
A. Zabbix (OpenSource)
http://www.zabbix.com/
B. Zenoss (Core edition is OpenSource, Enterprise edition is commercial)
http://www.zenoss.com/
C. Nagios (OpenSource)
http://www.nagios.org/
D. OpenNMS (OpenSource)
http://www.opennms.org/index.php/Main_Page


3. Service Monitoring
A. Woodstone ServersAlive (Commercial– Enterprise Edition: EURO 299)
http://www.woodstone.nu/salive/