knuten

This plugin let you add a shortcode with two different image sources one too a normal sized image and one for retina. The plugin will then load the right image depending on if it’s a retina display or not. 
For more info and how to use it.
<h3>A brief Markdown Example</h3>
<pre><code>[retina normal="path-to-normal-image" retina="path-to-retina-image" width="image-width" height="image-height" /]
</code></pre>

Retina for WP

This plugin let you add a shortcode with two different image sources one too a normal sized image and one for retina.

Ram Ratan Maurya

Codestag

StagTools powers your WordPress website with some regularly needed shortcodes including buttons, columns, alerts, font icons etc. It also includes several widgets and editor styles.
Shortcodes:
<ul>
<li>Buttons ( optionally, with font icons )</li>
<li>Columns</li>
<li>Dropcaps</li>
<li>Tabs</li>
<li>Toggle</li>
<li>Font Icons by <a href="http://fortawesome.github.io/Font-Awesome/" rel="nofollow ugc">Font Awesome</a></li>
<li>Google Maps with 5 predefined styles, and map types</li>
<li>Custom Sidebars Area ( requires <a href="https://wordpress.org/plugins/stag-custom-sidebars/" rel="ugc">Stag Custom Sidebars</a> plugin )</li>
<li>Image with CSS3 filters</li>
<li>Videos ( supports <a href="https://codex.wordpress.org/Embeds#Okay.2C_So_What_Sites_Can_I_Embed_From.3F" rel="nofollow ugc">oEmbeds</a> )</li>
</ul>
Widgets: Twitter, Dribbble, Flickr
Custom Post Types: Portfolio, Slides, Team, Testimonials
<h4>Get Involved</h4>
If you are a developer, you can contribute to the source code on <a href="https://github.com/mauryaratan/stagtools" rel="nofollow ugc">StagTools Github Repository</a>
Checkout our finely tuned WordPress themes over at <a href="https://codestag.com?ref=WordPress" rel="nofollow ugc">Codestag</a>.

StagTools

StagTools is a powerful plugin to extend functionality to your WordPress themes offering shortcodes, FontAwesome icons and useful widgets.

Retina for WP vs StagTools