Docupilot - Document Generation, Document Automation software
iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
JasperReports - JasperReports Server is a stand-alone and embeddable reporting server.
LibreOffice - Writer - Open-source cross-platform word processor.
WebMerge - WebMerge is an online platform that allows you to easily collect data, populate a document and send it to any contact automatically.
docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.