LibreOffice - Writer - Open-source cross-platform word processor.

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.

Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

Wondershare PDFelement - All-in-one PDF editor

AppFlowy - AppFlowy is an open source alternative to Notion. You are in charge of your data and customizations.