Jonah Brown

This plugin activates a TinyMCE button, when clicked on, shows a dropdown of shortcodes you can insert into any post type.

EDD Shortcode Menu

Enables a TinyMCE button for Easy Digital Downloads Shortcodes

isabel104

Elio Rivero

This is an extension for Easy Digital Downloads that automatically adds related downloads after the single download content on the single download page. It is simple and light. It works by default without a need for any settings. By default, 3 related downloads will be shown, related by download_tag. The title and featured image will be displayed, centered nicely. The related downloads are added right below the content of the single download.
Optional – use it as widget 
It also adds a Related Downloads widget. You can use the widget if you prefer, and disable the automatic related downloads under the content.
<ul>
<li>Unobtrusive Styling – Fits right into your theme</li>
<li>Responsive CSS is included so it looks good on any size screen.</li>
</ul>
Works automatically. No settings needed.
This plugin has 7 optional settings. These options are located at <code>Downloads --> Settings --> Extensions tab</code>.
<ol>
<li>Filter by Tag or Category</li>
<li>Show only the related image, no title</li>
<li>Change the number of related items to show</li>
<li>Custom Related Downloads Title</li>
<li>Disable Related Downloads From Being Added to Content</li>
<li>Change The Default Method of Sorting (Orderby)</li>
<li>Change The Default Sort Order</li>
</ol>
For more info, see the <a href="https://isabelcastillo.com/docs/about-edd-related-downloads" rel="nofollow ugc">Documentation</a>.
For support or to report bugs, use the support forum link above.
Fork on <a href="https://github.com/isabelc/EDD-Related-Downloads" rel="nofollow ugc">GitHub</a>.
Please <a href="https://wordpress.org/support/view/plugin-reviews/easy-digital-downloads-related-downloads" rel="ugc">rate the plugin</a>. Thank you.
Translations
Includes a <code>.pot</code> file so you can easily translate into other languages.

Easy Digital Downloads – Related Downloads

Kudos to the developer for creating an optimized free alternative for the paid version of a similar extension by EDD. Although the plugin still works well with the latest WordPress 5.3.2, PHP 7.3.12, EDD 2.9.22, I believe the developer should release an update just to be on the safe side, making sure there are no errors happening on the back-end & also so that the wordpress repository stops showing the plugin hasn't been updated in the last 3 years.

Great plugin & a free alternative to EDD's paid extension

Automatically show related downloads by tag or category when using Easy Digital Downloads plugin.

EDD Shortcode Menu vs Easy Digital Downloads – Related Downloads