Completely preprogrammed to be tightly integrated with QuickBooks®, Core Invoices is a complete invoicing and payment module that can be added on to any FileMaker Pro database system or purchased as an optional integrated module for Core CRM. Core Invoices comes as an unlocked solution which makes it 100% customizable so you can modify it to fit your specific business needs... - (Productive Computing Inc.)
Plus d'infos : http://www.fmpro.org/news/337512308270/