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.
Zamzar - Free conversion online of many type of documents (images, text, video, audio...
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
Online Convert - Convert files like images, video, documents, audio and more to other formats with this free and fast online converter.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Convertio - File Conversion in the Cloud