If you are interested in contributing to Eclipse Krazo, have a look at our GitHub repository and the contribution guide.
Eclipse Krazo is using Travis for building and testing pull requests and Jenkins for publishing nightly builds. The project is using Apache Maven which allows contributors to build the projects easily themselves.
GitHub Repositories
You can use the code from these repositories to experiment, test, build, create patches, issue pull requests, etc.
https://github.com/eclipse-ee4j/krazo - Project repository hosted on GitHub.
https://github.com/eclipse-ee4j/krazo-extensions - Project repository hosted on GitHub.