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.
LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.
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
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
DataMelt - DataMelt (DMelt), a free mathematics and data-analysis software for scientists, engineers and students.