GKrellM
GKrellM is a single process stack of system monitors which supports applying themes to match its appearance to your window manager, Gtk, or any other theme. To subscribe/unsubscribe to the GKrellM mailing list or to read the list archives go to http://archive.lists.netservicesgroup.com. The archive is for the ...
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GKrellM Reviews
I've been using it for years now.
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