Daniel Menȝies

View all WordPress Dashicons on one page. Adds a menu entry to the Tools menu.

Dashicons Viewer

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.

Dashicons Viewer vs Post Featured Font Icon