The Style Guide is a living document where we are working to capture a reference for a consistent user experience across our suite of applications and sites. This is the best place to begin if you are wanting to learn how we look and function out there on the interwebs.
We put all of our code up on Github. It's a great way to collaborate and publish our work. We've got a few public repos that we've opened up and are working to make more of our projects open source. Please jump over to our profile and check out some of the open source projects that we are working on!