OpenStack seems to be trending, if you are into the whole cloud thingy. I've only been in contact with TaskFlow, the state and workflow management library that

OpenStack seems to be trending, if you are into the whole cloud thingy. I've only been in contact with TaskFlow, the state and workflow management library that OpenStack uses, and I'm very impressed how well-engineered it is. On a related note, OpenStack uses RabbitMQ, and that seems to be trending too. Not a huge hype, but a steady adoption by both open source community and enterprises. And if not RabbitMQ, then being familiar with some kind of asynchronous messaging framework certainly wouldn't hurt.