Here is some information to help you get up and rolling in the progether community.
We use git as our version control. It allows us to manage our code and merge code together. We also use Github which using git, lets us share our code online.
Check out the subreddit for projects you might be interested in or join the IRC and chat to our members about your skills and what projects you could help contribute to! Alternatively keep an eye on our projects page where our active projects are kept.