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.

Mark Puts

Simple plugin to redirect your old URL’s that give a 404 to their new URL. For example: you deleted some categories and changed the permalink structure -> WordPress isn’t redirecting your posts to the right page and gives a 404, your old URL was dead-category/my-page.html and it’s now /my-page.html. This plugin fixes this issue and creates a 301 redirect to your right url. We don’t save any data to your database! So we also don’t create logs of your 404’s. You can use a different plugin for that like Redirection (recommended to install since you can view and add redirections this plugin might missed).

MP smart redirect: Simple 404 redirecter, without entering 404 pages and redirects!

Simple plugin to redirect your old URL's that give a 404 to their new URL. For example: you deleted some categories and changed the permalink str …

404 Silent Salesman vs MP smart redirect: Simple 404 redirecter, without entering 404 pages and redirects!