Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
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.
Signatture - Get paid to receive email
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
Spider Free - Spider Free helps developers to turn any website content into structured data that they can use for any purpose.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request