afshintalebi

This plugin add font awesome library to the front of wordpress site and you can put font awesome css classes anywhere in your contents. After the plugin installed , in the settings > Attach Font Awesome Options you can set load library files from Local or CDN.

Attach Font Awesome

This plugin add font awesome library to the front of wordpress site and you can put font awesome css classes anywhere in your contents.

Max Lynch

This plugin adds a simple <code>[icon]</code> shortcode for adding icons. For example, add the wonderful earth icon with <code>[icon name=ion-earth]</code>. You can 
also use this plugin with HTML like this: <code></code>
To add icons, use the shortcode in the editor or add the HTML right into your templates!

Ionicons Official

Add over 900 free and open source mobile, iOS, Android, and social media icons to your wordpress site with the only official Ionicons WordPress plugin …

Attach Font Awesome vs Ionicons Official