Hunter - Find all the email addresses related to a domain
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
MailDump Verifier - Powerful Emails Verifying Tool that helps verify email address or validate email addresses
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
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
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.