RabbitMQ - RabbitMQ is an open source message broker software.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Google Cloud Functions - A serverless platform for building event-based microservices.