Katsushi Kawamori

<h4>Set a featured image for post by a category</h4>
<ul>
<li>Bulk set the featured image of all the posts, when setting the category featured image.</li>
<li>If there are multiple categories, the parent category featured image takes precedence.</li>
<li>Can apply a category featured image to the post featured image, when posting.</li>
<li>Supports Custom Post Types.</li>
</ul>
<h4>Warning</h4>
<ul>
<li>Pressing the “Update” button after “Add New Image” or “Replace Image” under “Edit Category” will change the featured image for all posts in that category.</li>
<li>Even if you do not set an image, pressing the “Update” button under “Edit Category” will remove the featured image for all posts in that category.</li>
<li>If you do not need this feature, do not use this plugin !</li>
</ul>


Category Featured Image

Set a featured image for post by a category.

sewpafly

<p>To meet the needs of themes where the post-thumbnails have random and capricious sizes (which causes wordpress to crop images simply from the middle (either chopping off the top and bottom or chopping off the sides), this plugin attempts to give the users an interface to manually fix those thumbnail and random images.</p>


Post Thumbnail Editor

Does not work

Fed up with the lack of automated tools to properly crop and scale post thumbnails? Maybe this plugin can help.

Category Featured Image vs Post Thumbnail Editor