图标字体和CSS工具包：Font Awesome
Font Awesome提供了可缩放的矢量图标，可以使用CSS所提供的所有强大的特性对它们进行更改，包括：大小、颜色、阴影或者其它任何支持的效果。
特性：
One Font, 519 Icons
In a single collection, Font Awesome is a pictographic language of web-related actions.
No JavaScript Required
Fewer compatibility concerns because Font Awesome doesn't require JavaScript.
Infinite Scalability
Scalable vector graphics means every icon looks awesome at any size. Free, as in Speech
Font Awesome is completely free for commercial use. Check out the
license.
CSS Control
Easily style icon color, size, shadow, and anything that's possible with CSS.
Perfect on Retina Displays
Font Awesome icons are vectors, which mean they're gorgeous on high-resolution displays. Plays Well with Others
Originally designed for
Bootstrap, Font Awesome works great with all frameworks.
Desktop Friendly
To use on the desktop or for a complete set of vectors, check out the
cheatsheet.