Niraj Chauhan

This plugin will help the user to add a drop-down-custom-taxonomy box with the help of small code on his desired location.
<h4>Options</h4>
just place this small code into your theme file and the drop-down box will appear on that page 
code: 
for example, if you want to display it on home page, 
then navigate to index.php, the inside that put this code, if you want to display the custom taxonomies, then just replace category with your custom taxonomy name.

Drop-down-taxonomy

This plugin will help the user to add a drop-down-custom-taxonomy box with the help of small code on his desired location.

hijiri

Generate Custom Post Types and Custom Taxonomies from the WordPress administration which is easy to understand. 
It’s a must have for any user working with WordPress.
This Plugin published on <a href="https://github.com/hijiriworld/custom-post-type-generator" rel="nofollow ugc">GitHub.</a>

Custom Post Type Generator

Generate Custom Post Types and Custom Taxonomies.

Drop-down-taxonomy vs Custom Post Type Generator