Amazon MQ - Amazon MQ is a managed message broker service for ActiveMQ that makes it easy to set up and operate message brokers in the cloud. Easily migrate messaging.
RabbitMQ - RabbitMQ is an open source message broker software.
ZeroMQ - ZeroMQ is a high-performance asynchronous messaging library.
Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
Apache Qpid - Apache Qpid makes messaging tools that speak AMQP and support many languages and platforms.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.