Stealthy: Secret Messenger - Chat anonymously with friends & strangers
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Berkanan - Chat with people nearby. Even offline, on an ✈️.
Mycroft.AI - Mycroft is the world’s first open source assistant.
Roomvine - Chatrooms for real life venues, neighborhoods and events
Google Assistant - Get things done with Google Assistant