- More information on Celery can be found at http://www.celeryproject.org/.
- The recommended message brokers (https://en.wikipedia.org/wiki/Message_broker) are RabbitMQ (https://en.wikipedia.org/wiki/RabbitMQ) or Redis (https://en.wikipedia.org/wiki/Redis). Additionally, there is MongoDB (https://en.wikipedia.org/wiki/MongoDB), Beanstalk, Amazon SQS (https://en.wikipedia.org/wiki/Amazon_Simple_Queue_Service), CouchDB (https://en.wikipedia.org/wiki/Apache_CouchDB), and IronMQ (https://www.iron.io/mq).