GKrellM is a computer program based on the GTK toolkit that creates a single process stack of system monitors. It can be used to monitor the status of Central processing units, main memory, hard disks, network interfaces, local and remote mailboxes, and many other things. Plugins are available for a multitude of tasks, e.g. controlling the XMMS media player or a client from within the stacked monitor. GKrellM has become popular among users of GNU/Linux and *BSD systems.

GKrellM is free software, released under the GNU General Public License.

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