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

Rahul Aryan

Let your visitors react to content of your site. Customizable icons and set where to show.

Vote & Smiley Reaction

Good plugin :)

Add vote and reactions to posts, comments and taxonomies.

Emoji Reactions vs Vote & Smiley Reaction