Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
NextPlane - NextPlane offers cloud-based, scalable unified communications federation service for the enterprise.
Mycroft.AI - Mycroft is the world’s first open source assistant.
Sameroom - Chat interoperability-as-a-service
Google Assistant - Get things done with Google Assistant