WooCommerce Variation Swatches is the most popular attribute variation swatches plugin in the WordPress plugin directory. The plugins is an awesome creation by GetWooPlugins team keeping in mind to create new experience for WooCommerce product variations.

Demo
https://getwooplugins.com/plugins/woocommerce-variation-swatches/

Download
https://www.filecad.com/mx2v/WooCommerce-Variation-Swatches-Pro-v1.0.35.rar