After you get up and running, you can place Font Awesome icons just about
  anywhere with the <i> tag.
  Many examples appreciatively re-used from the Bootstrap documentation.
Place Font Awesome icons just about anywhere with the <i> tag.
<i class="icon-camera-retro"></i> icon-camera-retro
        To increase the size of icons relative to its container, use icon-large, icon-2x,
        icon-3x, or icon-4x.
      
        Increase the icon size by using the icon-large (33% increase), icon-2x,
        icon-3x, or icon-4x classes.
      
icon-camera-retro
icon-camera-retro
icon-camera-retro
icon-camera-retro
<p><i class="icon-camera-retro icon-large"></i> icon-camera-retro</p>
<p><i class="icon-camera-retro icon-2x"></i> icon-camera-retro</p>
<p><i class="icon-camera-retro icon-3x"></i> icon-camera-retro</p>
<p><i class="icon-camera-retro icon-4x"></i> icon-camera-retro</p>
        Use icon-border and pull-right or pull-left for easy pull quotes or
        article graphics.
      
<i class="icon-quote-left icon-4x pull-left icon-muted"></i>
Use a few of the new styles together ... lots of new possibilities.
<i class="icon-flag icon-4x pull-left icon-border"></i>
Use a few of the new styles together ... lots of new possibilities.
Easily replace individual bullets.
<ul class="icons-ul">
  <li><i class="icon-li icon-ok"></i>Bulleted lists (like this one)</li>
  <li><i class="icon-li icon-ok"></i>Buttons</li>
  <li><i class="icon-li icon-ok"></i>Button groups</li>
  <li><i class="icon-li icon-ok"></i>Navigation</li>
  <li><i class="icon-li icon-ok"></i>Prepended form inputs</li>
  <li><i class="icon-li icon-ok"></i>…and many more with custom CSS</li>
</ul>
<form>
  <div class="input-prepend">
    <span class="add-on"><i class="icon-envelope"></i></span>
    <input class="span2" type="text" placeholder="Email address">
  </div>
  <div class="input-prepend">
    <span class="add-on"><i class="icon-key"></i></span>
    <input class="span2" type="password" placeholder="Password">
  </div>
</form>
icon-spin class to get any icon to rotate. Works well with icon-spinner and
      icon-refresh.
    <i class="icon-spinner icon-spin icon-large"></i> Spinner icon when loading content...
CSS3 animations aren't supported in IE7 - IE9.
<i class="icon-shield"></i>  normal<br>
<i class="icon-shield icon-rotate-90"></i>  icon-rotate-90<br>
<i class="icon-shield icon-rotate-180"></i>  icon-rotate-180<br>
<i class="icon-shield icon-rotate-270"></i>  icon-rotate-270<br>
<i class="icon-shield icon-flip-horizontal"></i>  icon-flip-horizontal<br>
<i class="icon-shield icon-flip-vertical"></i>  icon-flip-vertical
Rotating and flipping icons aren't yet supported in IE7.
icon-stack class on the parent and
      icon-stack-base for the bottom icon.
    <span class="icon-stack">
  <i class="icon-check-empty icon-stack-base"></i>
  <i class="icon-twitter"></i>
</span>
icon-twitter on icon-check-empty<br>
<span class="icon-stack">
  <i class="icon-circle icon-stack-base"></i>
  <i class="icon-flag icon-light"></i>
</span>
icon-flag on icon-circle<br>
<span class="icon-stack">
  <i class="icon-sign-blank icon-stack-base"></i>
  <i class="icon-terminal icon-light"></i>
</span>
icon-terminal on icon-sign-blank<br>
<span class="icon-stack">
  <i class="icon-camera"></i>
  <i class="icon-ban-circle icon-stack-base text-error"></i>
</span>
icon-camera on icon-ban-circle
Anything you can do with CSS font styles, you can do with Font Awesome.
Star Ratings (inspired by CSS Tricks)