CyberChimps

Create a new slider through the iFeature Slider menu, where you can upload your images or use ones you have in your media library.
Once you have added your images you have a few more options for your new iFeature Slider.
<ul>
<li>Change the slider delay in seconds</li>
<li>Change the transition time in seconds</li>
<li>Select to auto slide</li>
<li>Set Caption for slider images</li>
</ul>
Publish your slider and copy and paste the shortcode anywhere in your site to see it in action

iFeature Slider

Creates a 2 slide image slider and the shortcode required to place it anywhere in your site.

Aspiring Web Developer

This plugin brings the power of Zurb TwentyTwenty to your blog. From our friends at Zurb:
<blockquote>
We recently needed a way to showcase the visual differences between two images. Folks tend to typically place two images next to each other in hopes that it’ll be clear exactly what changed. We even thought about having one image fade into another. But we knew there had to be an even better way to highlight the differences between two images. A way that would bring everything into focus.
</blockquote>
Find out more about TwentyTwenty, and see examples, on the <a href="http://zurb.com/playground/twentytwenty" rel="nofollow ugc">official TwentyTwenty site from Zurb</a>.
<a href="http://aspiringwebdev.com/gorgeous-before-and-after-pictures-in-wordpress/" rel="nofollow ugc">Watch this screencast</a> to see the plugin in action and learn how to use it.
<h3>Instructions</h3>
<ol>
<li>
Make sure your before and after images are the same size. The before-and-after box will use the size of the first image, and assume that the second image is the same size.
</li>
<li>
Insert two images into a post, one right after the other.
</li>
<li>
Before the first image, type <code>[twentytwenty]</code>. After the second image, type <code>[/twentytwenty]</code>. See the second screenshot for an example.
</li>
</ol>
<a href="http://aspiringwebdev.com/gorgeous-before-and-after-pictures-in-wordpress/" rel="nofollow ugc">Watch this screencast</a> to see the plugin in action and learn how to use it.

TwentyTwenty

Show before-and-after pictures in your blog, with an interactive slider that allows users to compare them.

iFeature Slider vs TwentyTwenty