Ewout

waltervos

Use this plugin to display the featured image for any post or page in your sidebar. If a featured image has been set. If no featured image has been set, the plugin tries to use the image of the parent post/page. Otherwise, no widget is displayed.

Featured Image Widget

This doesn't pull in any photos in the sidebar. The title shows up, but no images are shown. Bummers. Maybe this worked before, but it certainly doesn't now. I am using Twenty Fourteen for the theme.



Doesn't work with latest WordPress

Provides a widget that displays the featured image for a post or page. If a featured image has been set. If no featured image has been set, the plugin …

wphigh

Admin Featured Thumbnail WordPress plugin can Add featured image thumbnail to WordPress admin columns. It will help you easy to know which post is attached the featured image. Add click the thumbnail will popup preview the full image.
It also support custom posts.
<a href="http://www.wphigh.com/portfolio/admin-featured-thumbnail-wordpress-plugin" rel="nofollow ugc">Feedback Admin Featured Thumbnail</a>

Admin Featured Thumbnail

Add post thumbnails to admin list of posts.

Featured Image Widget vs Admin Featured Thumbnail