Posteo - Web- and IMAP-based email service. 2GB cost 1€/month.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Inbox.lv - Inbox.lv Mail
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
CounterMail - Countermail is a web-based email service. It is hosted in Sweden. Its focus is on privacy.
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.