http://wp.tekapo.com/2014/04/19/how-to-use-the-official-icon-font-of-the-wordpress/
Dashicons
https://developer.wordpress.org/resource/dashicons/#chart-bar
Genericons
http://genericons.com/#wordpress
Bootstrap（concrete5）
http://bootstrap3.cyberlab.info/components/glyphiconsTable.html
その他webアイコンフォント
http://weboook.blog22.fc2.com/blog-entry-388.html
http://h2ham.net/font-awasome