nip24.pl

Plug-in nip24.pl is designed for all the WooCommerce platform users. It dynamically downloads data which is needed to place an order and is necessary to prepare an invoice. The user can do it within seconds thanks to entering Tax Identification Number (NIP) which allows the system automatically quickly fills in required form fields. Portal nip24.pl currently contains information about more than 3.7 million companies which are registered in Poland. 
This plug-in not only supports filling out the online form at the FrontEnd, it also manages some additional features at the BackOffice: 
* It gives the user opportunity to verify whether the company which is placing the order exists, did not suspend the business or did not end the business. 
* It enables the user to generate and transmit fiscal documents such as e-invoice and e-receipt. 
Detailed information about the use of plug-in is available on: http://nip24.pl/dokumentacja

NIP24 for WooCommerce

Free GUS API to retrieve corporate data from the Central Statistical Office (GUS) in Poland.

isikom

Zauker

Plugin for WordPress woocommerce that allow add to cart sample item of a certain products
Compatibility with plugins:
<ul>
<li>WooCommerce Chained Products</li>
<li>Min/Max Quantities</li>
<li>Measurement Price Calculator</li>
</ul>
<h4>GET INVOLVED</h4>
Developers can checkout and contribute to the source code on the <a href="https://github.com/isikom/woocommerce-sample" rel="nofollow ugc">GitHub Repository</a>.

NIP24 for WooCommerce vs WooCommerce Sample