LibreOffice - Writer - Open-source cross-platform word processor.
Aspose.PDF for Java - Aspose.Pdf is a Java PDF component to create PDF documents without using https://alternativeto.
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.
iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
IronPDF - SDK for creating and editing PDFs.