Tiny Scanner - Fast and easy to use mobile document scanner.
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.
Docus - Docus is a simple yet powerful Document Scanner for Android that enables you to scan various types of documents with great ease.
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
DocScan - DocScan is a PDF document scanner application for the iPhone smartphones that lets the users to scan their documents and get them in the PDF files.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request