PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
T2S - T2S app offers features through which you can open a pdf file to listen to it in your favorite language without much of a stretch.
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
@Voice Aloud Reader (TTS Reader) - @Voice Aloud Reader (TTS Reader) app provides features through which users can open text, pdf, doc, RTF, and various other files to listen to them in real-time.
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.
Arabic Speech to Text - Arabic Speech to Text app enables users to enter the text by using image scanning, voice recognition, and text features to start the conversation without much of a stretch.