alexhal

The Shop Ajax tags dropdown allows customers to sort products based on tags instead of variations. For example: 
Show all products with tag “Tshirt” or show all products with tag “Jumper” and “Jersey”.
This plugin still needs some development, but if you just need a basic AJAX tag widget it will do. 
We hope to release and updated version in a couple of weeks which works better.
This plugin is compatible with WordPress 4.0 and WooCommerce 2.2.0-bleeding.

Shop Ajax Tags Dropdown

This plugin adds an AJAX tag Dropdown widget to your WooCommerce shop.

danielflorea

This plugin is using places-select.js from <a href="https://tw.wordpress.org/plugins/wc-city-select/" rel="nofollow ugc">WC City Select</a>
This WooCommerce plugin transforms the text input for city. With this plugin you can provide a list of cities to be shown as a select dropdown, depends on selected state.
This will be shown in checkout pages, edit addresses pages, shipping calculator, etc.
<h4>Supported Countries</h4>
<ul>
<li>Romania</li>
</ul>

City Dropdown For Woocommerce

This Plugin change Woocommerce City input into a dropdown, based on states. Works only with Romania country!

Shop Ajax Tags Dropdown vs City Dropdown For Woocommerce