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http://torquebox.org/

TorqueBox is the ninja-grade Ruby application platform integrating popular technologies such as Ruby-on-Rails, while extending the footprint of Ruby applications to include support for Job Scheduling, Task Queues, SOAP Handling, and Telecom.

TorqueBox provides an all-in-one environment, built upon the latest, most powerful JBoss AS Java application server. Functionality such as clustering and cloud deployment is included right out-of-the-box.