The pyramid-scheduler package is a pyramid plugin that allows asynchronous and deferred task scheduling and management. It uses APScheduler for actual task management and Kombu for messaging between processes.

IMPORTANT: the pyramid-scheduler is very new, but fully functional. The following features are considered "beta", and should probably not be used in production:

Multiple queues. For now, just use a single queue (and thus you are limited to a single background process).
Intuitive sequence of job events. Currently, the events that can be listened to (from pyramid_scheduler.api.Event, such as JOB_CREATED, JOB_EXECUTED, JOB_CANCELED, and JOB_REMOVED) do not reliably fire in an intuitive order. For example, you may get a JOB_REMOVED event before the JOB_EXECUTED event for a deferred job.

A new wire protocol enabling applications to connect privately in a real-time and fully distributed manner, freeing them from relying on centralized datacenters

RT @rgaidot: "There's many queueing systems out there and each one of them is different and was made for solving certain problems"

HotQueue is a Python library that allows you to use Redis as a message queue within your Python programs.

pubsub via webhooks, or "twitter" for your applications

Another interesting twitter app. This one lets us #survey using #hashtags