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.

mitcho (Michael Yoshitaka Erlewine)

Sometimes you have a need for having links to external URLs show up interspersed among your own pages or posts. This plugin lets you easily create such “redirecting” posts or pages by simply setting a custom field.
Usage: Add the custom field with label “redirect” to any post or page. Enter the redirect target URL as the value of that custom field. Now all links on your site to that post or page will be replaced with that redirect URL! If you try to visit the permalink URL for that page, it will redirect the user to that redirect URL too.
This plugin actually also works fine to redirect a URL to another URL on the same site as well.
Placeholders: New in version 0.9: the strings <code>%home%</code> and <code>%site%</code> in URLs are replaced by the WordPress home URL and site URLs, respectively.
Development of this plugin was supported by the <a href="http://arts.mit.edu/" rel="nofollow ugc">Arts at MIT</a>.

Redirect by Custom Field

Changes the URLs pointing to pages and posts which have a "redirect" custom field, using that entry as the URL instead.

Pick-n-Post Quote vs Redirect by Custom Field