A brand new icon theme awaits for the curious Linux users who want to take the icon theme’s on a spin. These Arc icon based designs are flat and made by `horst3180 user !
Extract the .zip folder, inside you will find a folder called “Arc”, Move this folder to
~/.icons (or /usr/share/icons if you want it available globally).
To set up the icon theme you will need to use an app like Unity Tweak Tool.
[via:- omgubuntu.co.uk]