RabbitMQ

A robust, open-source message broker that facilitates communication between different services and applications using the Advanced Message Queuing Protocol (AMQP). RabbitMQ allows for asynchronous message processing, making it ideal for decoupling systems, load balancing, and ensuring reliable message delivery across distributed systems. It supports a variety of messaging patterns, including publish/subscribe, request/reply, and worker queues, and is commonly used in microservices architectures.