Based on the popular Equinox theme by Tiheum, the Equinox-i series features the same slick-looking appearance with the long-lost titlebar icons added for your viewing pleasure.

This theme depends upon the original Equinox theme, and needs to be installed beforehand to look properly. If you are on an Ubuntu box, the following terminal command will do the trick for you:

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