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
Grammarian PRO3 - Grammarian PRO3 is a feature-rich grammar checker that enables you to write better content without taking assistance from the English teacher.