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.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
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
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.