Volkmar Kantor

The plugin provides the functionality to adjust the crop region of cropped images. It add buttons to the edit-pages and media-dialog to access a crop-editor. 
In the crop-editor you can choose one or more (if they have the same ratio) imagesizes and cut-off the part of the image you want.
The plugin is especially useful for theme developers who want to keep full control over cropped image sizes. If you want to dive even deeper, you can get informations about the hooks and filters on the <a href="https://github.com/vollyimnetz/crop-thumbnails" rel="nofollow ugc">github page of the plugin</a>.

Crop-Thumbnails

Amazing work on this plugin. It make developers and users life easier creating a handy-way to crop thumbnails in the used sizes across the site.

Where's the button "This plugin should be native"?

"Crop Thumbnails" made it easy to get exacly that specific image-detail you want to show in your featured image or gallery image.

Travis Smith

Genesis Featured Images creates a option box to enable a default image for post thumbnails and/or featured images and a meta box to set a custom size for the featured image to be displayed. These default images will only appear any time a post, page or any custom post type does not have a featured image, or an image inside the post. So for those who write a lot of posts and want one image for the majority of your posts, this plugin works perfectly! Genesis Featured Images filters genesis_get_image() so anywhere you utilize genesis_get_image(), this plugin will provide a fallback option. Genesis Featured Images uses the WordPress Image Uploader and Library to upload the image to ensure that the proper thumbnails are created.
IMPORTANT: 
You must have <a href="http://wpsmith.net/get-genesis" title="Learn more about Genesis" rel="nofollow ugc">Genesis</a> installed. Click <a href="http://wpsmith.net/get-genesis" title="Learn more about Genesis" rel="nofollow ugc">here</a> to learn more about <a href="http://wpsmith.net/get-genesis" title="Learn more about Genesis" rel="nofollow ugc">Genesis</a>
<h3>Special Thanks</h3>
I owe a huge debt of gratitude to all the folks at <a href="http://wpsmith.net/go/studiopress" title="StudioPress" rel="nofollow ugc">StudioPress</a>, their <a href="http://wpsmith.net/go/spthemes" title="StudioPress Themes" rel="nofollow ugc">themes</a> make life easier.
And thanks to the various individuals who helped me through the beta testing.

Genesis Featured Images

This plugin sets a default image for post thumbnails for the Genesis framework.

Crop-Thumbnails vs Genesis Featured Images