8. Invoiceberry Templates for Word, Open Office, Excel, or PPT U.K. online invoicing software brand Invoiceberry offers free business plan templates in .docx, .odt, .xlsx, and .pptx formats.

Google Slides Users: We recognized an issue with the formatting in the header of the PPT templates that doesn't convert when the template is uploaded to Google Slides. We have rectified the issue, and ...