WooCommerce PDF Invoice v2.1.6 is the most professional and feature-rich invoicing extension which comes with premium support. For those that mean business.
Invoicing extensions are not ordinary extensions – documents must comply with accounting standards and regulations, the extension itself must be very reliable as a single flaw can mean additional costs later on.
Version 2.1.6, March 24 2015
[*] Fixed duplicate discount issue (related to order discounts no longer supported)