Erica

Easily load the Dashicons icon font on the front-end of your site. If you’ve ever wanted to use this snazzy little icon font but your active theme doesn’t load it on the front-end of your site for you, this plugin is here to save the day!
Activate and you’re ready to start using Dashicons on the front-end of your site via HTML and CSS.
IMPORTANT: This plugin does not make any shortcodes available to implement Dashicons icons. You can easily use the HTML and CSS options to display icons following the official Dashicons documentation at <a href="https://developer.wordpress.org/resource/dashicons/" rel="nofollow ugc">https://developer.wordpress.org/resource/dashicons/</a>.

Frontend Dashicons

Reminds me of our most popular plugin that started life with a single "enqueue" :)

Love the simplicity

Load the Dashicons icon font on the front-end of your site.

Kishores

Post Featured Icon: It allows to add font icons to post title, and there is option so that we can 
replace post thumbnail with font icon.
It supports:
<ul>
<li>dashicons</li>
<li>genericons</li>
<li>font-awesome</li>
</ul>
Please check here: <a href="http://opentuteplus.com/post-featured-font-icon/" rel="nofollow ugc">Demo 1</a> and <a href="http://blog.kishorechandra.co.in/project-fork-in-open-source/" rel="nofollow ugc">Demo 2</a>
It supports post,page.But we can add to custom post types to. It provides hooks i.e icon_post_type .
<blockquote>
Priority Support
If you are looking for more features, paid support or Custom WordPress Work, then you can hire me too. My email id : babunsahoo@gmail.com .
</blockquote>
<pre><code>// Our filter callback function
function icon_post_type_callback( $types ) {
 $types = array('post', 'page', 'product');
 return $types;
}
add_filter( 'icon_post_type', 'icon_post_type_callback', 10, 1 );
</code></pre>

Post Featured Font Icon

it supports dashicons, genericons, font-awesome.

Frontend Dashicons vs Post Featured Font Icon