As of December 2015, some good and free invoice software programs are InvoiceTo.me and OnlineInvoices.com. InvoiceTo.me lets users fill in the details of invoices and calculates the sales tax automatically. They can then download the invoices as PDF files.
OnlineInvoices.com offers a wide range of invoice templates, including sales invoice templates, consulting invoice templates, translation service invoice templates and auto repair invoice templates. It supports multiple currencies and lets users add discounts to their invoices. In addition, visitors can upload logos to their invoices, and they can download their invoices as PDF files or send them to clients directly from the website.