A new Icon set Aery for Ubuntu/Linux Mint/other Ubuntu derivatives

Install Aery icons in Ubuntu 15.04 Vivid/14.10 Utopic/14.04 Trusty/12.04 Precise/Linux Mint 17.1/17/13/Any Ubuntu or Linux Mint versions/and other Ubuntu derivatives

Aery icons are based on Elementary icons but most of the icons are created by Rho-Con-Linux. A beautiful and complete icon set for Linux distributions. This icon set is specially made for Elementary OS but it can be used with any Linux and with all kind of dark or light themes. It contains more than 6500+ icons in different sizes. Also checkout icons collection.
You can use Unity Tweak Tool, Gnome-tweak-tool or Ubuntu-Tweak to change icons.

To install Aery icons in Ubuntu 15.04/14.10/14.04/12.04/Linux Mint 17.1/17/13 open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
sudo add-apt-repository ppa:noobslab/icons
sudo apt-get update
sudo apt-get install aery-icons

To install Aery icons in Debian/any Ubuntu or Linux Mint version open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
wget -O aery-icons.deb https://launchpad.net/~noobslab/+archive/ubuntu/icons/+files/aery-icons_0.2~precise~Noobslab.com_all.deb
sudo dpkg -i aery-icons.deb
rm aery-icons.deb

That's it

Source: Aery icons