If you like Font Awesome, you're going to love Black Tie!
             

fa-sort-numeric-asc · Unicode: f162 · Created: v3.2 · Categories: Web Application Icons

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

fa-sort-numeric-asc
<i class="fa fa-sort-numeric-asc"></i> fa-sort-numeric-asc

Looking for more? Check out the examples.