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.

RallyUp - RallyUp is a dominating platform for making professional fundraising experiences for your nonprofit, company, school, team, or another group.

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

donate.ly - The Simplest Way to Fundraise.

PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request

Salsa - Anonymous messages in your workplace