Thumbnails Manager helps you to manage your thumbnails within the administrator panel. You can define a default ratio for thumbnail creation, rename, change the description or even delete your thumbnails.
This is the very first time I release one of my own plugin. Maybe because it is a little bit more finished than the previous ones even if I can?t say I spent a lot of time on this one.
Well? In other words, be indulgent and please give me helping comments and any wish for the next version.
A small list of features:
<ul>
<li>Change the default ratio for the thumbnails.</li>
<li>Display images by pages.</li>
<li>Rebuild thumbnails.</li>
<li>Rename and change the description.</li>
<li>Resize of thumbnails.</li>
<li>Delete of images.</li>
<li>Thumbnails creation size strategy: scaling, maximum size, fixed size</li>
</ul>
New in v0.7:
<ul>
<li>Thumbnails creation size strategy: scaling, maximum size, fixed size</li>
<li>A bug correction (impossible to save ratio value)</li>
</ul>

Thumbnails Manager

Thumbnails Manager helps you to manage your thumbnails within the administrator panel. You can define a default ratio for thumbnail creation, rename,  …

Aaron Butacov

Adds a [post_thumbnail] shortcode for use with wordpress post thumbnails. Size can also be set using [post_thumbnail size=”XXXX”]. (You can call the function directly in your theme with <code><?php post_thumbnail('size=thumbnail');?></code>.)
Just insert the shortcode into any post’s content and when it will be replaced with the featured image.
This works only with the featured images introduced in WordPress 2.9.
For more information head to the full information page for <a href="http://aahacreative.com/our-projects/wordpress-post-featured-image-shortcode/" rel="nofollow ugc">WordPress Post Thumbnail Shortcode</a>.

Insert Featured Image Shortcode

Adds a shortcode to insert the post's featured image into the post's content.

Thumbnails Manager vs Insert Featured Image Shortcode