Grammarly - Clear, effective, mistake-free writing everywhere you type.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Mycroft.AI - Mycroft is the world’s first open source assistant.
Typosaurus - Quickly check your website for spelling errors
Google Assistant - Get things done with Google Assistant