Software AG webMethods - Software AG’s webMethods enables you to quickly integrate systems, partners, data, devices and SaaS applications
RabbitMQ - RabbitMQ is an open source message broker software.
Azure Service Bus - Learn how to set up messaging that connects applications and services across on-premises and cloud environments. Tutorials, videos, API references, and more.
Apache ActiveMQ - Apache ActiveMQ is an open source messaging and integration patterns server.
Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.
ZeroMQ - ZeroMQ is a high-performance asynchronous messaging library.