Sohan Zaman

When you just want to manage the post thumbnail or featured images, you don’t have that on quick edit option. You have to go to the edit page, change featured image, save and then go to another post edit page and repeat the process.
Now with this plugin, you can do that directly from your “All Posts” page. When you activate the plugin, a new column called thumbnail is added there. From there, you can add, change or remove featured images of your post.

Easy Thumbnail Switcher

অসাধারণ

A simple plugin which adds ability to add/modify/remove featured image just from "All Posts" page on your dashboard.

FirstElement

takumin

Upload the image in the config page, just write a short code. 
Simple to see the slideshow. 
I corresponds to the trimming of the uploaded image.
管理画面から画像をアップロードし、ショートコードを書くだけでスライドショーが表示できます。 
アップロードした画像のトリミングに対応します。
<h3>Arbitrary section</h3>
Support:http://forums.firstelement.jp/forum/wp-simple-slideshow

Easy Thumbnail Switcher vs WP Simple Slideshow