There are times when you’d like to have a certain type of post appear in a widget for use in your sidebar or (in some themes) your header or footer.
I used this to display a random senryu on each page, but it will work equally well for any group of reasonably small posts.
There is the option to include the title of the post, the title of the widget, both titles, or neither.
If you want you can add a bunch of widgets, each showing up to five random posts from a different category.

Random One Cat Widget

This Widget shows up to five random posts from a given category

GeroNikolov

Infinite Scroll Random Post or ISRP, 
will implement AJAX loading (Infinite Scroll) for the article pages. 
The next article will be loaded when the user gets to the bottom of each article. 
URLs will be changed in the address bar when the user scrolls down to the second, third, fourth… article.
How it works? 
 
Simple as its name is. 
ISRP will automatically connect to your Posts Single Page and will load random Posts 
from Post Type post once the user hits the end of the page. 
That’s all, plug and play!
Looking for a DEMO? 
Check it <a href="https://geronikolov.com/escaping-the-recession-in-life/" rel="nofollow ugc">here</a>.
Log:
<ul>
<li>1.2 – Security patch & JS optimisation</li>
<li>1.1 – Update tested version of WP Core to 6.0.2</li>
<li>1.0 – Release</li>
</ul>

Infinite Scroll Random Post

would be nice to have option to set which posts to show, for example only from the same category or tag

works!

This plugin will implement AJAX loading (Infinite Scroll) for the article pages. The next article will be loaded when the user gets to the bottom of e …

Random One Cat Widget vs Infinite Scroll Random Post