Stream Framework is a python library which allows you to build activity streams & newsfeeds using Cassandra and/or Redis. If you're not using python have a look at Stream, which supports Node, Ruby, PHP, Python, Go, Scala, Java and REST. Stream Framework's authors also offer a web service for building scalable newsfeeds & activity streams at Stream. It allows you to create your feeds by talking to a beautiful and easy to use REST API. There are clients available for Node, Ruby, PHP, Python, Go, Scala and Java. The Get Started page explains the API & concept in a few clicks. It's a lot easier to use, free up to 3 million feed updates and saves you the hassle of maintaining Cassandra, Redis, Faye, RabbitMQ and Celery workers.