Please support Black Tie, the new icon font from Font Awesome!
             

fa-envelope-square · Unicode: f199 · Created: v4.1 · Categories: Web Application Icons

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-envelope-square
<i class="fa fa-envelope-square"></i> fa-envelope-square

Looking for more? Check out the examples.