Jonathan Desrosiers

Linchpin

Aaron Ware

<blockquote>
Similar functionality has been developed for the <a href="https://developer.wordpress.org/themes/advanced-topics/customizer-api/" title="Theme Customizer API" rel="nofollow ugc">Theme Customizer API</a> and was <a href="https://make.wordpress.org/core/2016/01/28/previewing-site-responsiveness-in-the-customizer/" rel="nofollow ugc">merged into WordPress core as of version 4.5</a>. This plugin will automatically deactivate when you install WordPress 4.5.
</blockquote>
When viewing the front end of the site, a “Responsive” button is added to the WordPress Toolbar. Clicking that will toggle an overlay with your website presented in various sizes for easy responsive design testing.
This can be useful both during theme development, and when writing content to verify it will be presented properly.
This plugin is a heavily modified version of <a href="http://mattkersley.com/" title="Matt Kersley's" rel="nofollow ugc">Matt Kersley’s</a> <a href="http://github.com/mattkersley/Responsive-Design-Testing" title="Responsive Design Testing" rel="nofollow ugc">Responsive Design Testing</a>.

Responsive Page Tester

Gives users with content creating permissions the ability to preview their site in a responsive testbed.

agraddy

The WooCommerce Fake Pay plugin is a payment gateway for WooCommerce that allows admin users to checkout without having to enter any payment information. Simply choose the “Fake Pay” payment option on checkout and it will process the order as if you had paid with a real payment gateway.
This plugin is useful for testing a WooCommerce checkout flow on a production site where real users are making payments with real payment gateways. The real users will not see the Fake Pay option but logged in admin users will be able to use the Fake Pay option.

Fake Pay For WooCommerce

Great little plugin for debugging, thanks!

Great for debugging

Thanks for making this plugin, it's perfect for testing. I'm currently using it with WordPress 5.3.2 and WooCommerce 3.9.2 

Perfect

A simple pass-through WooCommerce payment gateway that can be used for testing orders with an admin account.

Responsive Page Tester vs Fake Pay For WooCommerce