What are some alternatives?
When comparing LibreOffice - Writer and Atom, you can also consider the following products
Google Drive - 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.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.
Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
Apache OpenOffice Writer - Open-source word processor of the Apache OpenOffice suite.
Vim - Highly configurable text editor built to enable efficient text editing