shawfactor

Quickly increase your readers’ engagement by adding related posts to the bottom of your post content.
Posts with the most terms in common will display at the top!
This plugin is capable of finding related posts in multiple taxonomies and post types. Include or exclude terms from the search for related posts. Change the look and feel by using your own templates in your (child) theme.
Additionally this plugin allows you to override the related posts that are automatically generated and choose your own related posts.
Requires wp_body_open
Note this plugin requires wordpress 5.2 and for your theme to support the wp_body_open hook (most good themes do).
Like this plugin? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/lh-related-posts-by-taxonomy/" rel="ugc">leaving a 5-star review</a>.
Love this plugin or want to help the LocalHero Project? Please consider <a href="https://lhero.org/portfolio/lh-related-posts-by-taxonomy/" rel="nofollow ugc">making a donation</a>.
Plugin features:
<ul>
<li>Small Footprint. Unlike many other related post plugins this will have a minimal impact on site speed!</li>
<li>Highly Adjustable layout!</li>
<li>The ability to optionally manually set the related posts for each post in the post edit screen.</li>
</ul>

LH Related Posts by Taxonomy

A lightweight decisions not options related posts plugin.

divspark

Admin Title Check adds additional title checking functionality to the title field in the admin’s classic editor add and edit post pages. Typing 4 or more characters into the title field will trigger the title check. Any published (including privately) posts, pages and custom post type titles with exact or similar titles will be shown.
<h4>Prevent Duplicate Titles</h4>
Showing whether the title has been used by other posts and pages prevents duplicate titles (therefore may include duplicate slugs) from being added.
<h4>Find Similar Titles</h4>
Use existing posts’ titles to help craft a new one.
<h4>Simple</h4>
The title check is simple to use: just start typing in a title into the title field while adding or editing a post. Exact and similar titles will be shown.

Admin Title Check

Check whether the title matches other posts while adding or editing a post, page or custom post type in classic editor.

LH Related Posts by Taxonomy vs Admin Title Check