Event broker, services publish events onto the broker (events are stored in the streams/logs but can be processed by queues)

• Licence (mozilla at the time of this)
• Large community
• Queues and stream support (as of 3.9)
• Easy to setup
• Shovel support between AMQP 1.0 and 0.9 brokers
• Nice out of the box Admin UI
• Great performance