Hurricane. Sounds interesting, it's a distributed messaging system that works with various languages and thus offers integration of different systems. Among other things, it includes Python with WSGI and Ruby with Rails, making a distributed system based on Rails and Django conceivable. Additionally, there is a process manager, with which the processes themselves only need to handle standard I/O and then can be directly managed by Hurricane. I could imagine using this for one or the other project at the company.