bigacelloy

Utilizes the native WordPress custom meta field. Both Gutenberg and Classic Editor supports Custom Fields.
Pick-n-Post Quote plugin allows you to display a static or featured quote for the current post in the sidebar area. Displaying quote author and source is optional. Supports multiple instances of widget with different styling if used on both sidebars.
<h4>Features include:</h4>
<ul>
<li>Choose your own style</li>
<li>Font size</li>
<li>Font style</li>
<li>Text alignment</li>
<li>Text color</li>
<li>Optional display of quote author and source</li>
<li>Optional display on static pages</li>
</ul>
If you wish to display random quote on a current post, a plugin “Quote Collection” by Srini G already exists for this purpose.
Add Custom Field
If you are using the Classic Editor:
<ul>
<li>Go to WordPress Post edit screen and select one post where you want to show a featured quote.</li>
<li>Scroll to top of the page to see “Screen Options”.</li>
<li>Tick the “Custom Fields” checkbox.</li>
</ul>
If you are using the Gutenberg Editor:
<ul>
<li>Go to WordPress Post edit screen and select one post where you want to show a featured quote. </li>
<li>Click the “three-dots” settings button on the right side and go to “Options”. </li>
<li>Scroll down until you see the option “Custom Fields”. </li>
<li>Tick the “Custom Fields” checkbox. Wait for the page to reload.</li>
</ul>
Scroll down until you see the “Custom Fields” meta box. Click “Enter New” to add each custom field. Note that you only need to enter a field “key” once.
<ul>
<li>To add a quote, use “pick_n_post_quote” under Custom Field “Name”. Type your quote in the “Value” area. Hit “Add Custom Field”.</li>
<li>To add an author, use “pick_n_post_quote_author” under Custom Field “Name”. Type your author name in the “Value” area. Hit “Add Custom Field”.</li>
<li>To add a source, use “pick_n_post_quote_source” under Custom Field “Name”. Type your source in the “Value” area. Hit “Add Custom Field”.</li>
</ul>
When there is an entry for the custom field, you can verify if the meta data value exists in wp_postmeta table in the database. For the custom field meta key to appear in the dropdown under “Add New Custom Field”, there must be at least a single value entered.
Pick another post. Since you already entered one entry for each custom field key, they will now appear in the Add New Custom Field “Select” dropdown. You just need to enter their texts in the “Value” area.

Pick-n-Post Quote

Utilizes the native WordPress custom meta field. Both Gutenberg and Classic Editor supports Custom Fields.

XYDAC

This plugin is an Easy to use Taxonomy Manager to Customize Taxonomies and its Custom Fields, with great UI. 
<a href="https://downloads.wordpress.org/plugin/ultimate-taxonomy-manager.zip" rel="nofollow ugc">Download now!</a>.
<a href="http://taxonomymanager.wordpress.com/" rel="nofollow ugc">[Plugin URL]</a> | <a href="https://xydac.wordpress.com/2010/09/30/ultimate-taxonomy-manager-for-wordpress/" rel="nofollow ugc">[Tutorial]</a> | <a href="https://posttypemanager.wordpress.com/" rel="nofollow ugc">[Ultimate Post Type Manager]</a>
[[An upgrade of this plugin is <a href="https://wordpress.org/extend/plugins/ultimate-cms/" rel="ugc">[WordPress Ultimate CMS]</a>, Please upgrade to WordPress Ultimate CMS.]]
Some Features
<ul>
<li>Create Custom Taxonomies.</li>
<li>Customize every detail of Taxonomy.</li>
<li>Create Custom Fields for Taxonomy.</li>
<li>Show Taxonomy as Combobox on New post/Custom Post type page(Provides ability to select only single Taxonomy).</li>
<li>Create same Taxonomy for multiple Post types.</li>
<li>Manage Custom fields for all taxonomies registered (Except Media).</li>
<li>Supports creation of custom fields as Text Box,Combo Box.</li>
<li>Easy to use interface.</li>
<li>Short codes to display custom values wherever you want to display.</li>
<li>Allows Modifying Custom Fields for all Registered Taxonomies even for Category and Post Tags.</li>
</ul>
<h4>Update</h4>
<ul>
<li>Updated to Support View Item</li>
<li>Added Bonus Tweak to Add Default WordPress Categories to Pages.</li>
<li>Added Feature to Select permission based on User Role</li>
<li>Update Count Callback Function Name input for advanced users.</li>
<li>Added Jquery Support</li>
<li>UI Improved</li>
<li>Add Images to any Taxonomy say Category,Post-tags anywhere</li>
<li>UPDATED TO SUPPORT WORDPRESS MULTISITE</li>
<li>Filters shown on Post page</li>
<li>All taxonomies shown on Post page in columns.(Use screen option to customise)</li>
</ul>

Ultimate Taxonomy Manager

This is an Easy to use Plugin to Create, Customize, Manage Taxonomies as well as Manage its Custom Meta Fields. Now add images to category/tags.

Pick-n-Post Quote vs Ultimate Taxonomy Manager