For Linux Mint, http://linuxmint-art.org/?xcontentmode=8325 gives a lot of icon themes.
There are several installation methods:
1. Using PPA
2. Put the extracted icon theme directory intoThe/usr/share/icons directory.
3. Put the extracted icon theme directory intoThe ~/.icons directory.
Recommend a few good themes.
square:http://linuxmint-art.org/content/show.php/square+1.2?content=163528
Installation Method 1:
sudo add-apt-repository ppa:noobslab/icons2sudo apt-get updatesudo apt-get Install square-icons
Installation Method 2:
Wget-o Square-icons.deb https://launchpad.net/~noobslab/+archive/ubuntu/icons2/+files/square-icons_0.1.2~trusty~ Noobslab.com_all.debsudo dpkg-i square-icons.deb && RM square-icons.deb
Open "System Settings", appearance, Themes->other Settings, Icons, select Square.
faenza:http://gnome-look.org/content/show.php/faenza?content=128143
Https://code.google.com/p/faenza-icon-theme/downloads/list
http://qyiyunso.blog.163.com/blog/static/3507768620119178101965/
Change the icon theme for Ubuntu (icon theme)