Font Awesome
             

fa-file-text-o · Unicode: f0f6 · Created: v3.0 · Categories: Text Editor Icons

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

fa-file-text-o 
<i class="fa fa-file-text-o"></i> fa-file-text-o

Looking for more? Check out the examples.