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.

sungraizfaryad

Permalinks, as the name suggests, are permanent links to pages or posts, categories or tags on your website, which makes it easier for your visitors and search engines to navigate around your website.
How many times have you closed a website or not bookmarked it because the URL looked fishy? Plenty of times, isn’t it? There is something about long URLs with weird numbers and characters that make you not want to look at them. Custom Permalinks can change that notion. WordPress can create short, clear, simple, and to-the-point permalinks so that your URLs look professional along with your website.
But there is also a limit in WordPress, and that’s when this plugin comes into play. By using this plugin, you can simplify the permalinks further by removing the base slugs.

Remove Taxonomy Url

This is a purpose-oriented plugin that simply removes the taxonomy slugs from URL.

Drop-down-taxonomy vs Remove Taxonomy Url