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

fa-folder-open · Unicode: f07c · Created: v1.0 · Categories: Web Application Icons

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

fa-folder-open
<i class="fa fa-folder-open"></i> fa-folder-open

Looking for more? Check out the examples.