The Rubix project is under the GNU GPL v3 open source code licence so, when downloading, using, editing or distributing it, you will be automatically agreeing with every terms described in the licence.
The idea is that the knowledge acquired and derived due to this project may be forwarded without any limitation or barriers.
IMPORTANT
Although there is no update forecast for this project, it is still active in the original developer’s repository from which it has been forked: (Rafael Freire).