At JavaOne 2013, you can contribute to your favorite open source projects at the Codegarten in the OTN Lounge. Join open source experts and write a plugin, a feature, or a bug fix for a project you care about. It is a great way to get involved with open source and learn how to make a difference for the projects you're passionate about. Bring your laptop and your creativity to the OTN Lounge from 10:30am to 4:00pm Monday to Wednesday. Open to everyone, whatever your background.
"It's the opportunity for like-minded developers to come together and produce a piece of code, a patch, documentation, testcases or any other kind of contribution to an open source project of their choosing" explains Andres Almiray.
Java Champion, Griffon Lead, and Groovy Committer Andres Almiray along with Java Evangelist, and JavaFX Expert Stephen Chin are organizing the Codegarten. The projects on their list are Griffon, Groovy, GroovyFX, Gradle, Asciidoctor and more.
They have done it before at Devoxx, Jazoon and Gr8conf to name a few.