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.
123apps - A free web app that converts video files, allowing you to change the video format, resolution or...
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
online2pdf - This Online PDF Converter can convert all your files to PDF but also compress and merge PDF files! Word, Excel, PowerPoint, images and any other kind of document can be easily converted to PDF on Online2PDF.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Zamzar - Free conversion online of many type of documents (images, text, video, audio...