Oracle Tuxedo provides a scalable and highly available mid tier platform capable of managing and integrating heterogeneous applications. This overview datasheet explains its capabilities: "Oracle Tuxedo provides a service-oriented infrastructure for efficiently routing, dispatching, and managing requests, events, and application queues across system processes and application services".

If you'd like to give it a shot, you can download one of their developer virtual machines and give it a look. A tutorial is included inside as well as Netbeans and MySQL.