We use Git to manage our source code. The reference repositories are on GitHub:
To build our sources, follow the instructions in the README file in droolsjbpm-build-bootstrap.
To learn more about git, read the free book Pro Git.
It’s easy to keep an eye on the source code changes on the project:
Go to the GitHub website.
Click on the repository you’re interested in
Click on the link Commits to show the commit history.
You can subscribe to that feed with the orange feed icon link.