Sharon

Implement emojis into your posts and pages. Using CSS, transparent PNGs seamlessly integrate with your favorite theme and color scheme.
This plugin shows emojis by using shortcodes. It will not override the default <a href="https://codex.wordpress.org/Using_Smilies" title="WordPress Smileys" rel="nofollow ugc">Smileys</a>.
How To Use:
<ol>
<li>After activating this plugin, an emoji icon will appear next to your “Add Media” button above the editor window.</li>
<li>Click on that button to display the dropdown list of available emojis.</li>
<li>Click “Add Shortcode”, and the shortcode will automatically be added to your editor window.</li>
</ol>
Alternatively, you can type in your shortcode by hand using this format:
<pre><code>[sce emoji="happy" /]
</code></pre>

Sharon's Shortcode Emojis

Implement emojis into your posts and pages

stuartquin

Emoji Reactions allows visitors to a WordPress site to rate and react to 
content using Emojis.
<ul>
<li>Full set of emoji from <a href="http://emojione.com" rel="nofollow ugc">EmojiOne</a></li>
<li>Support for range of content – posts, pages, comments.</li>
<li>Track user votes – only one of each reaction per user per content item.</li>
<li>Shortcode support – add reactions anywhere in content</li>
</ul>

Emoji Reactions

Add emoji reactions to posts, pages and comments. Inspired by Slack

Sharon's Shortcode Emojis vs Emoji Reactions