wpmen

<blockquote>
<p>What we have created is a combination of elegance and simplicity.<br />
  To be able to post random show site users. Simply install and activate the plugin Random post with ajax and only using a shortcode in any part of the site that you want to display random posts.</p>
</blockquote>
<h4>Random Post with Ajax includes the following features:</h4>
<ul>
<li>Choice Categories</li>
<li>Choice of Post Type</li>
<li>Possibility to choose the number of posts</li>
<li>Show Content (Excerpt)</li>
<li>Display post date</li>
<li>Show Thumbnail of post</li>
<li>Beautiful design</li>
<li>User friendly</li>
<li>Responsive</li>
</ul>


Random Post with ajax

thanks to author

Combining beauty and efficiency to display random posts

Lucy Tomas

<p>Very simple plugin that will search for all the first images of your published posts, pages or custom post types and set them as the featured image.</p>
<ul>
<li>You can choose the post type you want to run the plugin on.</li>
<li>Option to overwrite the already selected futured images.</li>
<li>Option to select From / To date.</li>
</ul>


Set All First Images As Featured

still works

It simply didn't recognize any images in any of the posts, and so didn't work. :(

Didn't see the images in the posts

IT works on 5.0.3

Sets the first image of your posts, pages or custom post types as the featured image.

Random Post with ajax vs Set All First Images As Featured