полезные расширения для gnome-shell

Alternative Status Menu
Replaces GNOME Shell Status Menu with one showing Suspend/Hibernate and Power Off as separate items

Coverflow Alt-Tab

Replacement of Alt-Tab, iterates through windows in a cover-flow manner.

Remove Accesibility
Remove the accesibility button from the top panel. 

Quit Button
Replace user name and status icon with a quit button.

Displays Internet Speed