FranH

Dummy payment gateway for developers. Simulates IPN. Always marks Order as paid.
Useful for testing and developing. Never use it on live sites!

WooFakePay

Dummy payment gateway for developers. Simulates IPN. Always marks Order as paid.

Mikael Korpela

Miguel Lezama

A tool to observe how a page loads in different themes simultaneously. 
Useful for debugging plugins or Gutenberg blocks.
How to Use:
<ol>
<li>Install several themes you’d like to check out.</li>
<li>Create a new page.</li>
<li>Navigate to Tools → Back To The Theme</li>
<li>Choose if you want to demo editor- or view side.</li>
<li>Select the themes you’d like to check out.</li>
<li>Choose the page you just created. This page will be previewed with all the themes you’ve selected.</li>
<li>Click Do it!.</li>
<li>Scroll to see the page rendered with all the themes you selected.</li>
</ol>
You’ll see your page load with different themes in a bunch of iframes for handy preview and debugging.
A nice list of popular themes to test:
<pre><code>`
</code></pre>
wp theme install \ 
 astra \ 
 colormag \ 
 customizr \ 
 generatepress \ 
 hestia \ 
 hueman \ 
 oceanwp \ 
 shapely \ 
 storefront \ 
 sydney \ 
 twentyeleven \ 
 twentyfifteen \ 
 twentyfourteen \ 
 twentynineteen \ 
 twentyseventeen \ 
 twentysixteen \ 
 twentyten \ 
 twentythirteen \ 
 twentytwelve \ 
 vantage 
 `
See docs for <a href="https://developer.wordpress.org/cli/commands/theme/install/" rel="nofollow ugc">wp theme install</a>.
<a href="https://github.com/simison/back-to-the-theme" rel="nofollow ugc">Plugin’s source code on GitHub</a>.

Back To The Theme

See a page with different themes all at once, just like that!

WooFakePay vs Back To The Theme