smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.
Gossip based distributed information monitoring system for a cluster of Linux nodes. The package includes a daemon to run on every node of the cluster and client programs for obtaining and displaying information about all nodes
Nodemon is a visualization tool for monitoring system resource utilization. It was developed for monitoring the Columbia supercomputer, a 10,240-processor Linux system at NASA Ames Research Center. It can monitor resources on any Linux system or cluster
a 3d replacement for mosix's boring text based mon program.
Interaces with gomd (www.nonngu.org/gomd) so you dont have
to run this big openGL app on your cluster, just a handy server.