Christiaan Conover

<p>Author Customization gives you much more flexibility in managing post and page author data. Your author data will no longer be tied solely to the WordPress user system, and can now be managed on a per-post basis. Author name and description are saved with each post, allowing you to preserve this information as it was when the post was published.</p>
<p><strong>Features</strong></p>
<ul>
<li>Per-post author display name and biographical info</li>
<li>TinyMCE (WYSIWYG) editor for user profile and per-post biographical info</li>
<li>rel=”nofollow” link inside biographical info entries</li>
</ul>


Author Customization

Author Customization expands core author management with features such as per-post author information and rich user bio editing.

LuckyWP

<p>The plugin replaces plain-text editor for category, tag and custom taxonomy term description with the built-in WordPress WYSIWYG editor (TinyMCE).  This is allow you to insert images, use shortcodes, embed videos, audio and other content into term description.</p>
<h4>Features</h4>
<ul>
<li>Edit category and tag description with built-in WordPress WYSIWYG editor (TinyMCE).</li>
<li>Work in add and edit term forms.</li>
<li>Support WooCommerce category and tag description.</li>
<li>Support custom taxonomy term description.</li>
</ul>


LuckyWP Term Description Rich Text

Thanks to the author for the work. I already use on two sites

Very useful plugin

Replaces plain-text editor for category, tag and custom taxonomy term description with the built-in WordPress WYSIWYG editor (TinyMCE).

Author Customization vs LuckyWP Term Description Rich Text