ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
M - A personal assistant built inside Facebook Messenger
Mycroft.AI - Mycroft is the world’s first open source assistant.
Operator - Looking for something? Make a request and we'll find it.
Google Assistant - Get things done with Google Assistant
Magic - Get whatever you want on demand with no hassle, through SMS