Pippin Williamson

This plugin will provide a widget that allows you to display a list of terms from any custom (or built-in) taxonomy with a list of recent posts filed in each term. The terms are displayed in a list with each term’s posts shown in a nested list.
<h3>Features</h3>
<ol>
<li>Widget Title</li>
<li>Taxonomy to pull terms from</li>
<li>Number of posts to show per term</li>
<li>Multiple instances of the widget</li>
</ol>

Posts By Taxonomy Widget

Display a list of taxonomy terms with recent posts in those terms in a simple to use widget

Dhanendran Rajagopal

Initial version of this plugin is a fork of https://wordpress.org/plugins/taxonomy-converter/.
Copy or convert terms between taxonomies.
Taxonomies include categories, tags and any other custom taxonomies that may be present with your active theme and plugins.
This plugin, allows you to copy (duplicate) or convert (move) terms from one taxonomy to another or to multiple taxonomies, while maintaining associated posts.

Term Taxonomy Converter

Copy or convert terms between taxonomies.

Posts By Taxonomy Widget vs Term Taxonomy Converter