Stefan Matei

Applies a lightbox to all image links if and only if the screen is big enough to fit a lightbox. 
Because lightboxes on iPhones should be illegal.

Conditional Lightbox

Use a lightbox only if the screen is big enough.

Wouter Postma

This plugin adds a simple Javascript to your WordPress website that will check for each image if there is a retina version available. This will make sure that your images (logo’s, buttons, images with text) look sharp on Apple devices with retina displays.
When you have for example a logo of 200 by 200 pixels called “Logo.png”, you will need to upload a second image of 400 by 400 pixels called “Logo@2x.png” in the exact same directory.
<ul>
<li><a href="http://imulus.github.io/retinajs/" rel="nofollow ugc">Retina.js by imulus</a></li>
<li><a href="https://profiles.wordpress.org/wouterpostmanl#content-plugins" rel="nofollow ugc">View my other plugins</a></li>
</ul>

Retina @2x

Gets the @2x image and shows it on retina devices. Works fine!



Works fine

This plugin does exactly what it should do and it's lightweight and simple. 

Simple and Easy

A plugin that looks for retina images automatically based on the @2x naming convention.

Conditional Lightbox vs Retina @2x