What is that monitor utility?

[manny rosa]

Hey, not realy xfce related but... what is the name of
that system monitor utility on many of the xfce/xfce4
screenshots? It contains info on cpu, disk, eth,
etc... Here's a few links to such a screenshot

http://www.xfce.org/user-screenshots/Paul-large.jpg
http://members.home.nl/jbhuijsmans/screenshots/20021209.jpg

I would like to get it but I don't know what it's called.

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