http://docs.celeryproject.org/en/latest/index.html

Celery - Distributed Task Queue

Celery is a simple, flexible, and reliable distributed system to process vast amounts of messages, while providing operations with the tools required to maintain such a system.
It’s a task queue with focus on real-time processing, while also supporting task scheduling.
Celery has a large and diverse community of users and contributors, you should come join us on IRC or our mailing-list.
Celery is Open Source and licensed under the BSD License.