Jeremiah

This plugin makes creating a custom 404 page extremely easy. If you use WooCommerce you can even display products on your 404 page, helping you capture those lost sales.
Available options:
<ul>
<li>Display Featured or Recently added products</li>
<li>Set # of columns to display</li>
<li>Set # of products to display</li>
<li>Choose to display text only, products only or both</li>
<li>Set page title and text</li>
</ul>
This plugin is now supported by a pro version which includes:
<ul>
<li>The same functionality for empty search results</li>
<li>Priority support</li>
<li>First look at new features and functionality</li>
</ul>
Download the Pro version here – https://wpovernight.com/downloads/silent-salesman-pro/

404 Silent Salesman

Easily Create Custom 404 Page. Turn 404 traffic into profits with WooCommerce.

LibraFire

Redirects a user to the page (for example) about-me if he typed about-me1 or abbout-me214 or any similar case.

WP Redirect to similar page

Redirects a user to the most similar page to the url given in adress bar.

404 Silent Salesman vs WP Redirect to similar page