Softaken PDF Split and Merge - Split and Merge PDF files freely with Softaken PDF Split and Merge Software
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Aryson PDF Merge - PDF Merge software allows you to combine, join or merge multiple PDF files into One. Merge PST tool to merge PDF files into single Portable Document Format online for free.
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
Softdiv PDF Split and Merge - PDF software that allows you to easily split and merge PDF files in just a few steps.
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.