Ultra-Flat-Icons, is a simple flat and complete icon theme based on a theme of Flattr, French developer designer Stef Sansonetti.
Sorry for the spelling and phonetic errors in the text.
Owner and main writer of MintGuide.org is not a native English speaker.
Installation latest version into Linux Mint 13/14/15/16/17/17.1/17.2:
sudo add-apt-repository ppa:noobslab/icons sudo apt-get update sudo apt-get install ultra-flat-icons
lternatively, you could also run
sudo apt-get install ultra-flat-icons-orange
sudo apt-get install ultra-flat-icons-green