Spacewalk is licensed under the General Public License (GPLv2).
You can clone a copy with
git clone https://github.com/spacewalkproject/spacewalk.git
For more information please visit the Spacewalk developer wiki.
Source RPMs can be found at the same location as our binaries.
RPM binaries for the project are available for download via a yum repository here. Our RPM packages are GPG signed. Visit the download area of the project wiki for more information and access to the Spacewalk public GPG key. For more information on using this yum repository and installing Spacewalk, please visit the Spacewalk installation procedures on the developer wiki.