A Downloadable plasmiod from the KDE download site will Freeze up your Desktop. I installed it on two i686 boxes and it froze the Desktop, The mouse would move around but you couldn't click on anything, nothing would respond to clicks
The name; IP Address Monitor Author: Ireyon , it shows a World Globe and 91.96.176.157
Here is the author's Homesite.
http://opendesktop.org/content/show.php?content=118534