From UBUNTU
sudo apt-get install conky curl
mail check and if there is new mail message and sound notification
very simple and easy to install Gui - see screanshots
simple unpack and open Readme

Source (link to git-repo or to original if based on someone elses unmodified work):
v 01.1 - add icon in notificatyon message
& fix bag ^)
v01.2 fix package bag
v 01.3 new look & more convenience GUI
>show headers
Ratings & Comments
2 Comments
after unpack, rename conkyGmailV01_1.tar.bz2 to conkyGmailV01.tar.bz2. After this launch Install-sh... Sorry for the mistake.
in v 01.2 fixed