tomsansome

On upload this plugin will generate the following effects on that image:
<ul>
<li>Black and white</li>
<li>Blurred</li>
<li>Sharpened</li>
<li>Sepia</li>
<li>Pixelate</li>
<li>Negative</li>
</ul>
All effects come in the following sizes:
<ul>
<li>1000px x 1000px not cropped</li>
<li>800px x 800px not cropped</li>
<li>400px x 400px not cropped</li>
</ul>
These images are displayed in the Add Media area under the Size dropdown menu for use in pages and posts.
Usage with Advanced Custom Fields:
<pre><code><?php $image = wp_get_attachment_image_src(get_field('image'), 'image-effects-1000-bw'); ?>
<img src="<?php echo $image[0]; ?>"/>
</code></pre>
This example is of 1000px wide black and white version.
All possible image objects:
<ul>
<li>image-effects-1000-bw</li>
<li>image-effects-800-bw</li>
<li>image-effects-400-bw</li>
<li>image-effects-1000-blurred</li>
<li>image-effects-800-blurred</li>
<li>image-effects-400-blurred</li>
<li>image-effects-1000-sharpened</li>
<li>image-effects-800-sharpened</li>
<li>image-effects-400-sharpened</li>
<li>image-effects-1000-sepia</li>
<li>image-effects-800-sepia</li>
<li>image-effects-400-sepia</li>
<li>image-effects-1000-pixelate</li>
<li>image-effects-800-pixelate</li>
<li>image-effects-400-pixelate</li>
<li>image-effects-1000-negative</li>
<li>image-effects-800-negative</li>
<li>image-effects-400-negative</li>
</ul>
For more examples of the above, visit http://dev.twoblok.es/wp-image-effects.

Image Effects Generator

AspireSolution

No more photshop skills required to give your images a fancy look. With RoundIt you can make your images Round, set Round Corners, add border with color and add a shadow to your image. The plugin adds these features in the media manager where you upload the image files. You can set different roundness, border or shadow effect settings for different images by entering the desired input in the new fields.
Features 
1. Make Images round or set round corners 
2. Add borders alongwith border color and width 
3. Add shadow 
4. Set different effects for different pictures 
<h3>Arbitrary section</h3>

RoundIt plugin

With RoundIt plugin you can set special effects to your pictures that you add in pages or posts. You can make your images Round, set Round Corners, ad …

Image Effects Generator vs RoundIt plugin