by Reuven Karasik on WordPress.org
A WooCommerce Extension that enabled filtering products by Shipping class in the admin panel.

The WooCommerce Products table, after installing the plugin (notice the new column on the right)
This plugin adds two sections to the Products table in WooCommerce:
It also adds filtering to the Orders table in WooCommerce with similar capabilities. This feature considers each order to have one shipping class.