ActiveMQ - Java, but it talks STOMP so you can use it with anything. I'd go with 0mq or ActiveMQ, depending on your use case. Though, these aren't distributed

ActiveMQ - Java, but it talks STOMP so you can use it with anything. I'd go with 0mq or ActiveMQ, depending on your use case. Though, these aren't distributed, as Kafka claims to be.