Googsystray: Unified Google Services Notifier
It notifies on new messages, alerts, etc., and provides basic services quickly (Reading or sending a new SMS message, or marking an email read, for example.)
Installing it in Windows is as easy as any other application, just download the installer.
To install Googsystray in Linux, firstly make sure you have Python and pygtk installed, then download the .tar.gz archive and extract it. Open a terminal, navigate to the folder where you have extracted Googsystray, and run the following command:
sudo python ./setup.py install
Then, go to the bin subfolder from your googsystray folder, and double click the googsystray file.
To configure Googsystray, right click it’s icon on your systray and select “Preferences”:

To open an unread message, left click the service icon (Gmail, etc) in your systray (notification area).
And finally, to quickly see what’s new, right click a service icon.
