ijmccallum

This theme demo / theme switcher plugin will add a bar to the top of your WordPress site listing every theme you have installed. It gives visitors the ability to switch between themes and try out their look on your live site.
After installation it requires no set up, it just works.
If you would like to see any extensions to this theme switcher please don’t hesitate to contact me from my website or post something in the support section. And, if you like it – please leave something nice in the review section! The more popular this becomes the more likely I’ll be to work on giving it lots more extra awesome.
<h4>Why another theme switcher?</h4>
I built this theme switcher primarily for myself. There are a number of other theme switchers out there but they all require visitors to click on a drop down menu then select a theme to demo or have some other complication and none of them had the clean, simple, minimal way of switching that I was hoping for in a theme switcher. So I built this theme switcher to give visitors an instant list of all the themes I hope to develop which they will be able to demo in a single click, also it doesn’t need any set up so it’s very easy!
So, I imagine most of the people interested in this theme switcher would be theme developers but if there are any people who are really indecisive about how they want their website to look, I guess this could provide them with an interesting solution to the website design problem. Let me know if you can think of any other uses for a theme switcher!

IJM Theme Switcher Bar

Add a theme switcher / theme demo bar to your site. Allows users to switch the theme they see on your site.

Seth Smigelski

Ever wanted to serve a dedicated theme to visitors on handheld devices instead of a theme that is fine-tuned for big screen traffic?
Slim Mobile Theme Switcher is a highly optimized, lightweight plugin designed for websites that need to serve a different theme to mobile devices while preserving the primary desktop experience.
Instead of relying on clunky, resource-heavy device detection libraries, this plugin uses streamlined, modern user-agent detection to instantly route users to the correct theme before the page even loads.
<h3>Key Features</h3>
<ul>
<li>Three-way Theme Routing: Serve up to three different themes simultaneously. Set one theme for Mobile Phones, one for Desktops, and optionally enable a dedicated theme specifically for Tablets (iPads/Android tablets).</li>
<li>True Mobile Detection: Uses refined regex to separate small-screen phones from tablets (iPads/Android tablets).</li>
<li>Zero-Friction Setup: Select your themes from a simple dropdown menu. No coding required.</li>
<li>Manual Overrides: Allow users to manually switch between views using <code>?theme=handheld</code> or <code>?theme=active</code> or <code>?theme=tablet</code>.</li>
<li>Persistent Choice: Activating the ‘Remember Visitor’s Choice’ option ensures that when a user has manually selected a different theme, this preference is saved for 30 days via cookies.</li>
<li>No Bloat: Zero front-end CSS or JS added by the plugin itself.</li>
<li>Developer Friendly: Built by a developer for developers.</li>
</ul>

Slim Mobile Theme Switcher

Serve a lightweight mobile theme to phones while keeping desktops on your primary theme. Includes dedicated tablet routing.

IJM Theme Switcher Bar vs Slim Mobile Theme Switcher