Word / DOCX
Create and edit documents with their structure and formatting in mind.

Overview
Guidance for creating, inspecting and editing Word/DOCX documents while accounting for styles, numbering, tables, sections and tracked changes. The researched goal is to preserve structure through round-trip edits.
Documents · Editing · DOCX
Install for free from the official publisher
Original source & installation instructions
Template fidelity and tracked-change preservation need file-specific verification.