There are 2 repositories under custom-taxonomies topic.
A library which provides extended functionality to WordPress custom post types and taxonomies.
Magic Fields 2.X
WordPress CMS Plugin (1.X)
Create custom taxonomies in WordPress with easy-to-use interface.
oik custom content type manager
Inhabitent. A Wordpress project.
Gutenberg-friendly primary category plugin: choose a category to use in post's permalink. Works with CPTs and taxonomies.
Plugin to allow fast creation of WP custom post types and taxonimies
Custom Post Type and Taxonomies
A redesign for non-profit, Toughlove. Built using Wordpress and a hand-coded custom theme. Written in HTML, CSS, JavaScript and PHP. Custom post types, taxonomies and admin customizations were used to allow client to make important changes to the site themselves. -----You can view the original site below.
WordPress directory theme
WordPress plugin - custom posts and custom taxonomies for clashvibes theme.
Custom WordPress plugin - custom posts, taxonomies and block patterns for raythompsonwebdev-com theme