Those of us who use Ubuntu will be aware that Ubuntu has got a "partner repository", a repository which contains proprietary software which, by nature, cannot be included in the main repository. It is an idea which I personally think is excellent, as it allows software which goes against the principals of Open Source to be included for the benefit of standard users.
It's such a good idea that I'm amazed no-one else has copied it. Those who use a distro outwith the Ubuntu...