jPDFFields allows your application to get and set field values.
iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
iTextPDF - iText offers flexible tools for PDF creation, editing and inspection.
LibreOffice - Writer - Open-source cross-platform word processor.
JasperReports - JasperReports Server is a stand-alone and embeddable reporting server.
RadaeePDF Master SDK - RadaeePDF SDK is a powerful PDF rendering library for Android iOS and Windows 8/8.1, WindowsPhone and Windows 10 UWP. RadaeePDF SDK can render, create, annotate, modify PDF files. RadaeePDF SDK can get and set PDF form and acroform.
Post.As - A simple tool to publish _____ on the web