Sheetson - Instantly turn any Google Sheet into RESTful API
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Sheetsu - Turn Google Spreadsheet into API
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
T-Plan - T-Plan offers test case management and image based test automation software to the QA industry.
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.