docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.
CutePDF - CutePDF is a simple but entirely powerful PDF files creator, converter, and virtual printer.
HotDocs - Template-driven, automated document & form assembly software
FoxIt - FoxIt offers solutions to read and edit PDFs from PCs or mobiles.
XpressDox - XpressDox Desktop for Microsoft® Office Word is an affordable document assembly system.
Kdan PDF SDK - Kdan PDF SDK is a universal mobile library for developers who want to render, manipulate and annotate PDF files in their iOS, Android device