Chrome Developer Tool - Develop and Debug Chrome Apps & Extensions. By Google
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.
Profitable developer tools database - A database of 103+ hand-curated profitable developer tools
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
YouTeam - YouTeam is a new, smarter way to outsource.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request