BlockLayer Graph Paper - BlockLayer provides you with an online Printable Graph Paper with customizable properties and patterns to choose from, including Lines, Dots, and Isometric.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Printable Graph Paper - Printable Graph Paper from Kent State University is a valuable resource that you can download in PDF format and use wherever necessary.
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
Markdown to PDF - Super simple way to get your markdown files to PDF
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.