GNU-Darwin aims to be the most free Darwin-based Unix distribution. Our mission is two-fold: focus on new projects that leverage the unique capabilities of Darwin/Mach, and help Apple users to enjoy the benefits of free software.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
We have a special ports tarball for GNU/Linux users, which does not require root access. It is not fully automated yet, but you can untar it in your home directory and try it.