Code School - Try Git. GitHub For Beginners: Don't Get Scared, Get Started. It's 2013, and there's no way around it: you need to learn how to use GitHub.
Why? Because it's a social network that has completely changed the way we work. Having started as a developer's collaborative platform, GitHub is now the largest online storage space of collaborative works that exists in the world. Whether you're interested in participating in this global mind meld or in researching this massive file dump of human knowledge, you need to be here.
See also: GitHub For Beginners: Commit, Push And Go. Git. Git Tutorials and Training. Free source code hosting for Git and Mercurial by Bitbucket. GitHub · Build software better, together.