DimitriAus

This lightweight plugin removes WordPress emoji functionality to reduce HTTP requests and improve page load times.
What it removes:
<ul>
<li>Emoji detection script from page head</li>
<li>Emoji styles from frontend and admin</li>
<li>TinyMCE wpemoji plugin</li>
<li>Emoji conversion in RSS feeds</li>
<li>Emoji handling in emails</li>
<li>DNS prefetch for emoji CDN</li>
</ul>

Manly No Emojis

Disables the emoji functionality in WordPress to improve performance.

tuxlog

wp-monalisa is the plugin that smiles at you like monalisa does. place the smilies of your choice in posts, pages or comments.
There are a lot plugins for smiley support out there and some of them are really useful. 
Most of them don’t work out of the box and this is what wp-monalisa tries to achieve, giving you the ability to maintain your smilies and even turn them into img tags.
it’s easy and it smiles at you…what else do you want?
Features:
<ul>
<li>maintain your smilies in a separate directory</li>
<li>activate or deactivate smilies for posts or comments</li>
<li>replace smilies with img tags</li>
<li>extend or replace wordpress smiley replacement</li>
<li>while edit posts or pages, pops-up in a draggable meta-box</li>
<li>extends your comment form to give you visitors the freedom to smile 🙂</li>
<li>support for fckeditor (tested with v3.3.1)</li>
<li>fully integrated with BuddyPress, bbPress and wpForo</li>
</ul>
The video shows a short overview of what wp-monalisa can do for you. <iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/uHXlELn27ko?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Credits: 
Thanks go to all who support this plugin, with hints and suggestions for improvment and specially to
<ul>
<li>Michal Maciejewski, polish translation</li>
<li>Denny from http://www.vau3.de for testing and giving input for the BuddyPress integration</li>
<li>FJ Bakry, Camisto (https://camisto.com) for indonesian translation</li>
</ul>

wp-Monalisa

wp-monalisa is the plugin that smiles at you like monalisa does. place the smilies of your choice in posts, pages or comments.

Manly No Emojis vs wp-Monalisa