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.

jamalteri

Retain more visitors and SEO juice by redirecting all 404 error request to a specific page.

404 Redirect

Redirect all 404 errors to a specific page

404 Silent Salesman vs 404 Redirect