jeremywarne

If your site has a large number of categories, it can be helpful to be able to search through them rather than scrolling to find the one you need. This plugin adds a text box to the category list which filters the list in place, rather than providing an AJAX autocorrect, so it’s very fast.

Category filter

Filter a large number of categories when editing posts.

datafeedr

This plugin adds 2 drop down menus to your Media Library (WordPress Admin Area > Media) which enable you to filter the media in your library by the taxonomies and terms (ie. categories) your media is associated with.
Media is generally “attached” to Posts, Pages, Custom Post Types, etc. All these types of posts can be associated with taxonomies and terms. This plugin allows you to filter media which is attached to any type of post by the taxonomies and terms related to those posts.
Plugin inspired by <a href="http://wordpress.stackexchange.com/a/126873" rel="nofollow ugc">answer on StackExchange</a>.
Limitation
The filters are only available when viewing your Media Library in <a href="https://res.cloudinary.com/dpq5gf23t/image/upload/v1699630258/Plugins/list-mode_mobdn5.png" rel="nofollow ugc">“list” mode, not “grid” mode</a>.
<a href="https://res.cloudinary.com/dpq5gf23t/image/upload/v1699630258/Plugins/list-mode_mobdn5.png" rel="nofollow ugc">View screenshot for more explanation</a>.

Media Library Filter

Filter the media in your library by the taxonomies and terms with which they are associated.

Category filter vs Media Library Filter