List of GNOME 3 applets and gnome-shell extensions
http://www.webupd8.org/2011/10/official-gnome-shell-extensions.html lists some.
Weather
http://www.webupd8.org/2011/10/install-gnome-shell-weather-extension.html
http://www.webupd8.org/2011/10/official-gnome-shell-extensions.html lists some.
Weather
http://www.webupd8.org/2011/10/install-gnome-shell-weather-extension.html