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>.
</blockquote>

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.

Bashir Rased

bashirrased

RB Thumbnail Columns displays a Thumbnail Image column in the WordPress admin for Posts, Pages, and WooCommerce Products. 
This lets you quickly see which content has a featured image.
Lightweight, fast, and uses native WordPress functions only.
<h3>Features</h3>
<ul>
<li>Adds a thumbnail column to admin post lists</li>
<li>Supports Posts, Pages, and WooCommerce Products</li>
<li>Shows thumbnail preview (100×100)</li>
<li>Sortable thumbnail column</li>
<li>Filter posts:
<ul>
<li>Has thumbnail</li>
<li>No thumbnail</li>
</ul>
</li>
<li>No configuration needed</li>
</ul>

RB Thumbnail Columns

Adds a thumbnail (featured image) column to your WordPress admin post list screen.

Admin Columns – Icons Add-on vs RB Thumbnail Columns