ITSCircle POS - ITSCircle POS is a point of sale solution for retail stores.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Square - Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.