The 2.5.1 version of iFacturas for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Business Tools. This free Mac app is an intellectual property of Abser Technologies S.L. We recommend checking the downloaded files with any free antivirus.
From the developer:
iFacturas provides basic functionality to create and manage invoices and budgets associated to business customers and products. The application allows you to create invoices in a moment and send e-mail in PDF format instantly. The tool comes with several invoice or budget templates. It lets you easily create clients, products, quantities and prices.
You may want to check out more Mac applications, such as iRatchet, Sales Tax or Boursicoteur, which might be related to iFacturas.