ALEX ARCIGA

This plugin adds a “Duplicate Attribute” page under Products in the WordPress admin, allowing you to:
<ul>
<li>Duplicate WooCommerce global product attributes</li>
<li>Copy all attribute settings (name, slug, type, order by, visibility)</li>
<li>Copy all attribute terms in the same order</li>
<li>Copy all term meta (e.g. color preview codes, custom fields)</li>
<li>Preserve parent/child hierarchy for terms</li>
</ul>
Perfect if you need to quickly replicate existing attribute taxonomies for new products or stores.
<h3>License</h3>
This plugin is licensed under the GPL v2 or later. 
You are free to use, modify, and distribute it.

Duplicate Attribute

Duplicate WooCommerce global product attributes including all terms, term order, and term meta (like color previews).

GauravNagpal

Less sold products with special attributes and tags can be sold easily using this feature without affecting sales for popular products. WooCommerce coupon section extension for adding coupons for special attributes and tags.
After enabling this plugin, you will see a new multiple select box in the coupon “User Restriction” section. All the other preferences will not be affected; it will work perfectly as it was before.
<ul>
<li>Work for both attributes and tags</li>
<li>Coupon categories</li>
<li>No new section for coupons</li>
<li>All other existing features will remain the same</li>
<li>Can be clubbed with other WooCommerce coupon rules</li>
<li>Can be applied percentage or a flat amount on products</li>
<li>Supported variable and simple product types </li>
<li>Attribute created in “Products > Attributes” tab are supported</li>
</ul>
If you like this easy plugin and if the plugin is improving your sales, then <a href="https://www.paypal.me/gauravnagpal" rel="nofollow ugc">Donate</a> a little to this development time or at least spend a couple of minutes for feedback.

Attributes Coupon for WooCommerce

WooCommerce coupon section extension for adding coupons for special attributes and tags. Also, you can categorise the coupons.

Duplicate Attribute vs Attributes Coupon for WooCommerce