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

fa-spinner · Unicode: f110 · Created: v3.0 · Categories: Web Application Icons, Spinner Icons

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

fa-spinner
<i class="fa fa-spinner"></i> fa-spinner

Looking for more? Check out the examples.