GLS Inc.

This plugin adds featured images (thumbnails) to the default WordPress RSS feed. 
WordPressのデフォルトのRSSフィードにアイキャッチ画像(サムネイル)を追加するプラグインです。
Once activated, featured images will be automatically added to the RSS feed. 
プラグインを有効化すると、自動的にRSSフィードにアイキャッチ画像が追加されます。
This plugin is provided as-is, without any guarantees of functionality or support. 
本プラグインは無償で提供されており、動作の保証やサポートはありません。
Standard RSS Feed URLs: 
– Post Feed: <code>[your-site]/feed/</code> 
– Category Feed: <code>[your-site]/category/category-name/feed/</code> 
– Custom Post Type Feed (example): <code>[your-site]/feed/?post_type=custom-post-type</code>

GLS RSS Thumbnails

Adds featured images to WordPress RSS feeds. / WordPressのRSSフィードにアイキャッチ画像を追加します。

Kudratullah

Niamul

AbsolutePlugins

With Absolute Thumbnail Column you can upload, select or change post thumbnail (Aka Featured Image) with ease. No need to edit your page/post only just to change the thumbnail. It supports post types that have thumbnail supports.
Absolute Thumbnail Column is fully compatible with WooCommerce, integrates nicely with Image Column, and enabling uploading, selecting or changing product thumbnail from the list-table itself, saving a lot of time.
Absolute Thumbnail Column uses the native WordPress media popup, ensuring the security and integrity of core features of the media library.
<h3>Features</h3>
<ol>
<li>Unlimited Usages.</li>
<li>Supports all post type that has <code>thumbnail</code> support.</li>
<li>Builtin WooCommerce support.</li>
<li>Uses the native WordPress media popup.</li>
</ol>

Absolute Thumbnail Column

Absolute Thumbnail column allows you to upload, select and change thumbnail on any post-types right from the post table.

GLS RSS Thumbnails vs Absolute Thumbnail Column