Using icons is a great way to add a bit of personality to your website while improving usability. One of the most efficient ways to load icons is by using a font.
Font Awesome is an iconic font designed for use with Twitter Bootstrap. The icons have cross-browser support and even support IE7, should you be so unfortunate to be have to support it. There are 220 vector icons in the font and they were designed to be infinitely scalable and compatible with screen readers.
Font Awesome Icons Plugin for WordPress: