asposepdfcloud
Aspose.PDF Cloud is a REST API for creating and editing PDF files. Most popular features proposed by Aspose.PDF Cloud: PDF to Word, Convert PDF to Image, Merge PDF, Split PDF, Add Images to PDF, Rotate PDF. It can also be used to convert PDF files to diff
fdf-tools
A package to generate fdf (Forms data format) files
@dbeaulieu/pdffiller
Take an existing PDF Form and data and PDF Filler will create a new PDF with all given fields populated.