MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
ArangoDB - A distributed open-source database with a flexible data model for documents, graphs, and key-values.
Google Cloud Functions - A serverless platform for building event-based microservices.