dvddemattia

Free and easy to use plugin that allow you to add a list of related posts for each post, including Custom Post Types.
<h3>Features And Options:</h3>
<ul>
<li>Add relations between posts.</li>
<li>Set number of related posts (1-20).</li>
<li>Custom title and custom template path.</li>
<li>Working with shortcode [cptrp].</li>
<li>Simple and free.</li>
<li>More features coming on updates.</li>
</ul>

CPTRP

Plugin that allow you to add a list of related posts for each post, including Custom Post Types.

alexvtn

Related Posts by ThemeinProgress is the perfect plugin to easily display related posts in your WordPress articles.
Customize the appearance with 3 predefined layouts, hiding elements such as images, titles, dates, or authors. Use a dedicated shortcode to display them anywhere in your content.
Benefits:
<blockquote>
Increase time spent on your site: Displaying related posts engages visitors and encourages further navigation. 
 Enhance posts relevance: Related posts are fetched intelligently, improving the user experience. 
 Easy customization: Adapt the style of related posts to match your site’s design effortlessly. 
 Flexible integration: Add related posts anywhere with shortcode.
</blockquote>
Premium features.
<blockquote>
Carousel 
 Display a carousel of related posts (available only with the Classic and Hero layouts).
Related posts based of category and post tags 
 Besides the options available on the free version, you can load the related posts based of categories and post tags.
Options to manage the featured image 
 Set the thumbnail size and choose how to resize the image: maintain the aspect ratio or crop the image to the specified dimensions.
Additional options to manage the post elements 
 Additional options to manage the post elements, such as linking the title to the content, the author to their page, customizing the “Author” label, and truncating long content with ellipsis.
Option to exclude specific categories 
 You can select one or more categories to exclude from the related posts.
Option to exclude specific tags 
 You can select one or more post tags to exclude from the related posts.
Option to exclude specific posts 
 You can select one or more posts to exclude from the related posts.
Custom keywords 
 You can use custom keywords as Engine Search but you will need to set the keywords for each post to generate the list of related posts.
Device selection 
 You can select the device where you want to display the related posts.
Order by option 
 You can select how to order the related posts.
Sort order option 
 You can select the ordering of related posts.
Shortcode generator 
 Use a dynamic shortcode generator to add a specific related posts inside the WordPress article.
AMP support 
 Display rightly the related posts in AMP pages.
Custom post types support 
 You can enable the related posts for specific custom post types.
WordPress Pages Support 
 You can enable related content for WordPress pages as well. Related pages will be automatically determined based on keywords or the parent-child relationship between pages.
Backup section 
 You can create a backup of plugin settings, import an existing backup or restore the default settings.
</blockquote>
Live demo: 
<a href="https://demo.themeinprogress.eu/tip-related-posts-pro/" rel="nofollow ugc">https://demo.themeinprogress.eu/tip-related-posts-pro/</a>
You can get the premium version, from the following link: 
<a href="https://www.themeinprogress.com/related-posts-pro-wordpress-plugin-by-themeinprogress/" rel="nofollow ugc">https://www.themeinprogress.com/related-posts-pro-wordpress-plugin-by-themeinprogress/</a>
<h4>Installation</h4>
Once you have installed the plugin, you just need to activate the plugin in order to enable it.
<h4>Configuration</h4>
Install Related Posts by ThemeinProgress will add a new admin page, where you can manage all tracking codes and scripts.
<h3>Translators</h3>
<h4>Available Languages</h4>
<ul>
<li>English (Default)</li>
<li>Italiano</li>
</ul>

CPTRP vs Related Posts by ThemeinProgress