Jesper van Engelen

Enhance your admin overview screens by displaying icons instead of text labels in the table header and footer.
The Icons Add-on for Admin Columns adds functionality for displaying icons on the posts, users, media and comment overview screens, and any other screens Admin Columns Supports. It supports all column types that have a label! You can choose to select one of WordPress’ native <a href="https://developer.wordpress.org/resource/dashicons/" rel="nofollow ugc">Dashicons</a>, upload a new icon image, select an icon from your media library and choose a custom URL to retrieve the icon from.
<blockquote>
This plugin is an add-on for <a href="https://wordpress.org/plugins/codepress-admin-columns/" rel="ugc">Admin Columns</a>.
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Admin Columns – Icons Add-on

Use icons instead of text labels in column headers on post, user, media and other admin pages. Extension for Admin Columns.

Elemendas

Santiago Becerra

This plugin adds a featured image column to WordPress Dashboard. It automatically adds a column to any post type which supports a featured image. It’s an improvement from the plugin <a href="https://wordpress.org/plugins/add-featured-image-column/" rel="ugc">Add Featured Image Column</a>.
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<li>If the post has no featured image, it displays a “No image” svg icon to indicate this.</li>
<li>If the featured image is broken, it displays a red “Broken image” svg icon to indicate this.</li>
<li>The plugin opens a lightbox when click on featured image.</li>
<li>You can enable or disable the blue border on hover.</li>
<li>You can enable or disable the lightbox feature.</li>
<li>You can choose the shape and size of the thumbnail displayed at the dashboard.</li>
</ul>

Manage Admin Columns

This plugin adds a featured image column to WordPress Dashboard. It automatically adds a column to any post type which supports a featured image.

Admin Columns – Icons Add-on vs Manage Admin Columns