Google Docs 107 alternatives | Website
Free. Online. Integrated.
Your writings are automatically backed up. You can jump from the desktop to the tablet to the smartphone and continue the writing anywhere, as soon as inspiration hits you or when you manage a few quiet moments. It's also integrated with Google, which means quick searches from inside the text document, one of the best language grammar check, transcription tools, etc. GDocs has fewer features than, say, Microsoft Word, however, it has access to a library of plugins that will definitely cater to any specific needs and even outdo Word.
My favorite add-ons:
• Better Word Count (not available in the G Suite Marketplace)
• Extensis Fonts (gives an extended library of fonts which can be easily filtered)
• Fountainize (easily produce formated documents)
• LanguageTool (think "Grammarly" but with support for a wider range of languages)
• OneLook Thesaurus (one of the best thesaurus out there, seriously – also a website)