Ben Huson

<blockquote>
This plugin in only required for versions prior to WordPress 3.5 
 I am no longer continuing to provide support for this plugin. If anyone would like to take over commit access please contact me via the details in my profile.
</blockquote>
This plugin collapses and reduces the height of hierarchical category and taxonomy panels in the WordPress admin.
It always bugged me that when editing a post the categories panel took up so much height if you only had a few categories. This was also the same for custom hierarchical taxonomies.
This plugin just adds a couple of styles to your admin to override this and collapse that space.
I created an initial patch for this which, with contributions from other WordPress developers, was included in WordPress 3.5. You can <a href="https://core.trac.wordpress.org/ticket/15925" rel="nofollow ugc">see the patch here…</a>

Compact Taxonomy Checkboxes

Collapse and reduce the height of hierarchical category and taxonomy panels in the WordPress admin (not needed for WordPress 3.5+).

mrwweb

Adds a healthy does of Vitamin A to the WordPress Admin, putting carrots into all your checkboxes and radio buttons.
<h4>Other Plugins by MRWweb</h4>
<ul>
<li><a href="https://wordpress.org/plugins/mrw-web-design-simple-tinymce/" rel="ugc">MRW Simplified Editor</a> – Tame the WordPress Classic and Block Editors to help WordPress users focus on creating consistent, accessible, and portable content.</li>
<li><a href="https://github.com/mrwweb/post-type-archive-descriptions" rel="nofollow ugc">Post Type Archive Descriptions</a> – Add user-editable descriptions to the top of post type archive pages.</li>
<li><a href="https://wordpress.org/plugins/post-status-menu-items/" rel="ugc">Post Status Menu Items</a> – Adds post status links–e.g. “Draft” (7)–to post type admin menus.</li>
<li><a href="https://wordpress.org/plugins/feature-a-page-widget/" rel="ugc">Feature a Page Widget</a> – Feature a single page in any sidebar.</li>
</ul>

Compact Taxonomy Checkboxes vs CarrotPress