Socket.io - Realtime application framework (Node.JS server)
Google Cloud Functions - A serverless platform for building event-based microservices.
SocketCluster - An open, scalable realtime engine for Node.js
Apprenda - Apprenda is a software layer that transforms any infrastructure into a policy-driven, hybrid cloud application platform.
Primus - Primus, the creator god of the transformers & an abstraction layer for real-time to prevent...
appReef - Cloud Platform as a Service (PaaS)