Arya Themes

<p>Allows users to choose and preview all WordPress themes installed without<br />
activation or deactivation for demonstration purposes.</p>
<h4>Usage</h4>
<pre><code>https://example.com/?theme=slug-theme
https://example.com/?theme=slug-theme&child=slug-child-theme
</code></pre>


Arya Switch Theme

Works like a charm, perfect for theme developers.

Absolutely Brilliant !

Allows users to choose and preview all WordPress themes installed without

Remi Corson

<p>Choose a theme for logged-in admins only! This is a fully transparent method for all other visitors. This is a great way to work on a theme while visitors see the default theme.</p>
<p><a href="http://remicorson.com" rel="nofollow ugc">Developer Website</a> – <a href="http://remicorson.com/easy-admin-theme/" rel="nofollow ugc">Plugin’s Page</a></p>


Easy Admin Theme

Tested up to 3.4 Stable Tag: 1.0 With this plugin you can can specify a theme to display only for logged-in administrators.

Arya Switch Theme vs Easy Admin Theme