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.

TestGorilla - TestGorilla ATS is an applicant recruiting software that helps companies hire candidates easily without any hassle.

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

PaperShala - Open-source examination management solution Proctored Exam Software

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

Speedwell Software - Speedwell is an Online Exam Software that allows you to conduct dozens of exams in a single day with enhanced security.