MarcGuay

Automatically create human readable labels for custom image sizes created with <code>add_image_size()</code> so that they’re selectable in the WP admin. For example, when you insert media into a post, in the Attachment Display Settings->Size select list, your custom image size will now be available. The plugin uses the <code>image_size_names_choose</code> filter as described <a href="https://developer.wordpress.org/reference/functions/add_image_size/" rel="nofollow ugc">here</a> in the For Media Library Images (Admin) section. By default the human readable name is the ‘name’ variable given to <code>add_image_size()</code> stripped of non-alphanumeric characters and the first letter of each word in uppercase.

Human Readable Custom Image Sizes

Automatically create human readable labels for custom image sizes created with add_image_size() so that they're selectable in the WP admin.

Orangelab

Rickard Westerlind

Dramatically improve the quality of re-sized images by making WordPress use ImageMagick instead of standard GD image library.
Features
<ul>
<li>Preserve embedded color profile in re-sized image</li>
<li>Automatically recognize custom image sizes</li>
<li>Allow regeneration of existing images (optionally for selected image sizes only)</li>
<li>Configure image quality or use dynamically computed default value</li>
<li>Optimize different image sizes for either quality or size</li>
</ul>
Lnguages: English, French, German, Swedish, Turkish
Requires either ImageMagick binary or Imagick PHP module.
<h3>Contribute</h3>
Code repo available on https://github.com/orangelabweb/imagemagick-engine/

ImageMagick Engine

Maybe even better.  It uses ImageMagick Engine that is installed and allows me to easily regenerate all my images.

Works as advertised

The thumbnail regeneration could be a bit faster though. I have used it for longer than I can remember, at least 5 years.

Simple, functional

Improve the quality of re-sized images by replacing standard GD library with ImageMagick.

Human Readable Custom Image Sizes vs ImageMagick Engine