Raleway comes preinstalled with FontAwesome icon font. FontAwesome features 439 icons for you to use however you please. And is just one of the 3 icon font sets we offer, totaling in over 1000+ icons.
You can place FontAwesome icons just about anywhere using the CSS Prefix fa and the icon's name. Font Awesome is designed to be used with inline elements (FontAwesome's makers recommend the <i> tag for brevity, but using a <span> is more semantically correct). Which is what I do in this theme.
This icon set also offers some awesome extra features, you can use as well. You can go ahead and check out the shortcodes for those here: FontAwesome Shortcodes.