wpcraft

<p>ACF Meio Mask Field – addon for Advanced Custom Fields, adds custom field into Advanced Custom Fields, based on jquery.meiomask.js</p>
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<h3>A brief Markdown Example</h3>
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ACF Meio Mask Field

ACF Meio Mask Field - addon for Advanced Custom Fields, adds custom field into Advanced Custom Fields, based on jquery.meiomask.js

tormorten

<p>Add a Font Awesome icon to your post with this awesome standalone custom metabox.</p>
<p>Font Awesome gives you scalable vector icons that can instantly be customized — size, color, drop shadow, and anything that can be done with the power of CSS.</p>
<p>For developers it is easy to use the field in your theme. With the template functions <code>the_fa()</code> for echoing and <code>get_ga()</code> for returning the icon within the WordPress loop.</p>
<p>A handy Font Awesome shortcode is also included. Add an icon to your post by inserting <code>[fa icon="fa-gear"]</code>, where the attribute is the name of the Font Awesome icon. You can also insert the current post icon by using the shortcode <code>[fa]</code>.</p>


Font Awesome Field

Great plugin

Adds a metabox with a field where you can select a Font Awesome icon.

ACF Meio Mask Field vs Font Awesome Field