RedMQ
Simple, flexible messaging with Redis.
...At its core is a Python TCP server built on Asynchronous Messaging Protocol and Twisted's AMP module. This means RedMQ can support clients in any language, though only two clients - PHP and Python - have been implemented to date. The API is designed with flexibility in mind, providing native support for conditional messaging and custom message routing as well as standard point-to-point and publish-subscribe messaging models.