Observable - Interactive code examples/posts
simperium - Move data everywhere it's needed, instantly and automatically
Commons - Private Clubhouse for your team to collaborate and connect
GUN - Self-hosted Firebase.
Echoes - Voice-first messaging for fast & collaborative remote teams
PubNub - PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.