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

fa-reply-all · Unicode: f122 · Created: v3.1 · Categories: Web Application Icons · Aliases: fa-mail-reply-all

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

fa-reply-all
<i class="fa fa-reply-all"></i> fa-reply-all

Looking for more? Check out the examples.