Amazon Blueprints - Create your own Alexa Skill in minutes
Grammarly - Clear, effective, mistake-free writing everywhere you type.
Reverb - Use Alexa on your Mac, iPhone and Android
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Lexi - Speak to Alexa through your iPhone
Editsaurus - Highlights potential pitfalls in your writing to encourage good habits.