Fontello has a big built-in collection of open source artworks by Fontello. To use with single element use this <span class="fontello-stopwatch"></span>

Vector line-icon font by Amit Jakhu. Version 1.0. To use with single element use this <span class=" icon-align-justify"></span>

A set of 250+ carefully crafted pictograms by Daniel Bruce. To use with single element use this <span class="entypo-note"></span>

The iconic font designed for use with Twitter Bootstrap by Dave Gandy.Avant comes baked with Font Awesome 4.0.1, which provides you with scalable vector icons that can instantly be customized — size, color, drop shadow, and anything that can be done with the power of CSS.