Deskbar Applet is a Gnome applet to allow easy access to various search engines (like Google's Deskbar for Windows).
Deskbar Applet looks like the current Gnome Mini-Commander, but it launches search queries instead of programs.
Example search-engines include:
Local File Search (and eventually also Beagle)
A related idea was posted at http://live.gnome.org/AuricApplet.
· gnome-python2-applet (depending on your distribution, this package may have an alternative name, such as python-gnome2-extras)