Open Source Monitoring System for performance and availability.
Identify sizes of memory modules installed on most UNIX-based systems
Storage, SAN, LAN Performance Monitoring: IBM,NetApp,Hitachi,HPE,EMC
Collect much configuration data and record all changes in a logbook
Scalable, distributed monitoring system for high-performance computing
Lightweight Event Management System (for Monitoring-Events and more)
Web based management tool for unixes