normal
  fa-rotate-90
  fa-rotate-180
  fa-rotate-270
  fa-flip-horizontal
  fa-flip-vertical

To arbitrarily rotate and flip icons, use the fa-rotate-* and fa-flip-* classes.

{% highlight html %}   normal
  fa-rotate-90
  fa-rotate-180
  fa-rotate-270
  fa-flip-horizontal
  icon-flip-vertical {% endhighlight %}