Trevald

I was looking for a plugin that would add the possibility to filter the post list in admin based on available taxonomies for the current post type. Could only find snippets that neede to be modified per post type and taxonomy. This plugin works with native post types aswell as custom. It checks which taxonomies are registered for each post type and display only relevant taxonomies as filters.

Niko Taxonomy Filters

Adds taxonomy filters to post listing pages in admin. Creates dropdown only for taxonomies connected to current post type.

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.

Niko Taxonomy Filters vs Media Library Filter