Goods Catalog provides a catalog of products organized into categories. It is easy to use and fully customizable.
Allows you to use the PayPal for Digital Goods gateway to accept payment for a digital item.
Veeqo integrates your WooCommerce stock with other online marketplaces and allows you to print shipping labels in one click.
You can put in Products you have in your storage. As post type you could easily write theme templates for it.