mustache - Mustache is a simple web template system with implementations available for ActionScript, C++...
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
StringTemplate - StringTemplate is a java template engine for generating source code, web pages, emails, or any other formatted text output.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Handlebars - Handlebars is a JavaScript template library that is, more or less, based on ...
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.