Icon themes

Faenza Icon theme:

sudo add-apt-repository ppa:tiheum/equinox
sudo apt-get update
sudo apt-get install faenza-icon-theme

Faience Icon theme:

sudo apt-add-repository ppa:suraia/ppa
sudo apt-get update
sudo apt-get install faience

Elementary Icon theme:

sudo add-apt-repository ppa:elementaryart/elementarydesktop
sudo apt-get update
sudo apt-get install elementary-icon-theme