Xymon monitors your hosts, your network services, and everything else.
Monitoring Tool for your IT Environment
Linux performance monitoring on-screen or to CSV file
Enterprise-class, distributed monitoring solution for networks & apps
Complete control of your desktop from your browser
Computer performance display and logging program
Software, Server and Application Monitor
A server and database monitoring platform.
Redhat Linux OVM System Performance Monitoring
AIX and VIOS Partitions and Systems Performance (PSP)