erez_lieberman

This very simple plugin Hides the top three fields (author, email, and website) in comment form and after you will click on the big comment field this three fields will be open smoothly.
After you upload and activate the plugin the comments forms on your site will look like this: 
 <iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/SIZOk0WA3sE?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>
in the <a href="https://wordpress.org/plugins/wp-toggle-comments-form-fields/screenshots/" rel="ugc">screenshoot section</a> you can look on the first screenshot – it’s a litlle animated gif that illustrates the effect. 
You can see a live preview of this plugin in <a href="http://www.studio-hitchadshut.co.il/%D7%AA%D7%95%D7%A1%D7%A3-%D7%97%D7%93%D7%A9-%D7%A9%D7%A4%D7%99%D7%AA%D7%97%D7%AA%D7%99-%D7%9C%D7%90%D7%AA%D7%A8%D7%99-%D7%95%D7%95%D7%A8%D7%93%D7%A4%D7%A8%D7%A1-wp-toggle-comments-form/" rel="nofollow ugc">my site</a>, this is a blog post(in hebrew) about my plugin, in the comments form(bottom of page) of this post you can see how its look like with this plugin.
<h4>Languages</h4>
<ol>
<li>English</li>
<li>Hebrew</li>
</ol>

WP Toggle Comments Form

Toggle The Comments Form Fields On Wordpress Posts And Pages

Vladimir Prelovac

WP Wall is a “Wall” widget that appears in your blog’s sidebar acting as a cool shoutbox for your visitors.
The comment will appear in the sidebar immediately, without reloading the page.
All comments are internally handled by WordPress so that means you have normal comment moderation, SPAM protection and new comment notification.
WP Wall is fully customizable with a CSS file and included graphics.
WP Wall features: 
* Global commenting “Wall” 
* Comments are handled entirely by WordPress 
* RSS Feed for the Wall 
* Smilies 
* Instant delete for admin 
* Option to display HTML and make links clickable 
* Navigation through pages 
* Interactive Wall: It can automatically refresh turning into a chat
Plugin by Vladimir Prelovac. Also check out <a href="https://managewp.com" rel="nofollow ugc">ManageWP</a>.
<h3>License</h3>
This file is part of WP Wall.
WP Wall is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
WP Wall is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with WP Wall. If not, see <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

WP Wall

"Wall" widget that appears in your blog's sidebar acting as a cool shoutbox for your visitors.

WP Toggle Comments Form vs WP Wall