ZMQ socket based networking library, which can also be molded as broker-less messaging framework. The slides talks about how zmq been woven to work with openstack services.
An introduction to Twitter with tip and tricks to setting up your profile, creating your niche community, crafting your tweets, tracking links and getting followed.
A short guide to how to sign up for and use Twitter.This has been developed to help people take part in the #learning3 experiment online: http://www.lluk.org/learning3.htm