Aki Hamano

<p>RichText Extension adds useful decorating features to gutenberg rich text editor.</p>
<h4>Highlighter</h4>
<p>Draw a marker on the inline text.<br />
You can set the color, thickness, and opacity of the marker to you can create various marker styles.<br />
Up to four types of settings can be made.</p>
<h4>Font size</h4>
<p>Change inline text size.<br />
The size is specified as a percentage of the base font size, and up to four types of settings can be made.</p>
<h4>Underline</h4>
<p>Create underline.<br />
<strong>Note: The underline specifications have changed from version 2.0.0. Try clearing the format if existing underlines do not work.</strong></p>
<h4>Clear format</h4>
<p>Removes all formatting.</p>


RichText Extension

This is by far the best approach I've seen so far on really adding something usable to the WP Gutenberg Block Editor

well done ...

Adds useful decoration features to the Gutenberg RichText editor toolbar.

C-Metric

<p>C-Metric – Easy Block Editor plugin allows you to create a rich text block field within a separate “C-METRIC” Block category. The content added to the block is dynamically reflected on the frontend, providing a flexible and powerful way to manage your site content.</p>
<h3>Features:</h3>
<ul>
<li>Adds a custom block category “C-METRIC” in the Gutenberg editor.</li>
<li>Provides a rich text block that allows dynamic content updates on the frontend.</li>
<li>Simple and easy to use interface, fully integrated with the Gutenberg editor.</li>
</ul>
<h3>License & Copyright Information</h3>
<p>This plugin is licensed under the GPLv2 or later. Feel free to contribute, modify, and share under the terms of this license.</p>
<h3>Source Code</h3>
<p>The non-minified versions of the JavaScript files used in this plugin are available in the plugin’s directory:</p>
<ul>
<li>JavaScript: <a href="gutenberg/src/index.js" rel="nofollow ugc">gutenberg/src/index.js</a></li>
</ul>
<h3>Build Tools</h3>
<p>This plugin uses <a href="https://www.npmjs.com/" rel="nofollow ugc">npm</a> and <a href="https://webpack.js.org/" rel="nofollow ugc">Webpack</a> for asset compilation. To build the project, please follow these steps:</p>
<ol>
<li>Navigate to the <code>gutenberg</code> directory:<br />
   `bash<br />
cd /wp-content/plugins/easy-block-editor/gutenberg</li>
</ol>
<p>2.Install dependencies:<br />
npm install @wordpress/scripts –save-dev</p>
<p>3.Build the assets:<br />
npm run build</p>


C-Metric – Easy Block Editor

The C-Metric Gutenberg Block plugin lets you add dynamic rich text blocks under "C-METRIC" for flexible and powerful content management on your site

RichText Extension vs C-Metric – Easy Block Editor