Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
RabbitMQ - RabbitMQ is an open source message broker software.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.