Today we will see another icon theme for Ubuntu called Cryo64-Mixed. This icon theme is available in different styles, you can check them all here. In this page we will only see how to install two styles under Ubuntu 11.10/12.04 (Unity).
1. Cryo64-Mixed Installation
Download this icon theme from here, then extract it via the terminal with these commands:
sudo tar -xzvf Cryo64-Mixed.tar.gz -C /usr/share/icons/
gsettings set org.gnome.desktop.interface icon-theme 'Cryo64-Mixed'
2. Cryo64-MX Red Installation
Download the icon theme from here then run the following commands to extract it:
sudo tar -xzvf Cryo64-MX-Red.tar.gz -C /usr/share/icons/
gsettings set org.gnome.desktop.interface icon-theme 'Cryo64-MX-Red'
You can find here more Ubuntu icon themes.