GrandSlambert

<p>Display posts from selected taxonomies in your sidebars. Multiple formats including featured images are possible.</p>
<h4>Features</h4>
<ul>
<li>Display posts with additional options from any or all entries in a slected taxonomy in your sidebars.</li>
<li>Option to display on posts in the same categories as the current post on single post pages.</li>
<li>Fully templated – add more templates in your own theme and select them in your widgets. Includes four templates.</li>
<li>Creates two new image sizes for use in widgets – set the sizes on the options screen.</li>
<li>Use the category title or write your own title, even link the title to the category (if one selected).</li>
</ul>
<h4>Languages</h4>
<p>This plugin includes the following translations. Translations listed with no translator were created by the plugin developer using Google Translate. If you can improve these, you can get your name listed here!</p>
<ul>
<li>German</li>
<li>French</li>
<li>Italian</li>
<li>Spanish</li>
</ul>


Pretty Sidebar Categories

Display posts from selected taxonomies in your sidebars. Multiple formats including featured images are possible.

Felix Arntz

<p>The plugin adds two taxonomies to the WordPress media library which are then available to categorize and tag your attachments. By default, these taxonomies, although sharing the same names and behavior, are separate from the default post taxonomies, but this can easily be changed if desired.</p>
<p>The plugin follows WordPress Core principles and offers a lightweight alternative to similar approaches which often tend to be incredibly flexible, but at the same time complicated and bloated. And if you have a little knowledge of code, you should be able to adjust the plugin exactly to your needs if the default configuration doesn’t satisfy you.</p>
<h4>Features</h4>
<ul>
<li>Adds categories and tags to the Media Library (independent from the regular post categories and tags)</li>
<li>Inserts filter dropdowns for attachment taxonomies into the media toolbar and media modal</li>
<li>Allows to pick taxonomy terms for attachments from within the Attachment Selection & Edit modals</li>
<li>Adds a setting for the default attachment category</li>
<li>Enhances the <code>[gallery]</code> shortcode so that images of a specific attachment taxonomy can be included automatically</li>
</ul>
<h4>Quality attributes</h4>
<ul>
<li>Lightweight plugin following WordPress Core principles</li>
<li>“Decisions, not Options”</li>
<li>Can easily be used as a must-use plugin</li>
<li>Provides a flexible API to add other attachment taxonomies or disable the existing ones for developers</li>
<li>Provides an easy-to-use <code>has_default</code> argument that can be used when registering an attachment taxonomy in order to automatically add a setting for the default taxonomy term</li>
</ul>


Attachment Taxonomies

Works perfect!

Now this is a piece of art!  No bloat, no hassle.  Well done Felix!

Piece of Art

This plugin adds categories and tags to the WordPress media library - lightweight and developer-friendly.

Pretty Sidebar Categories vs Attachment Taxonomies