The Free Software Foundation has an official list of Free GNU/Linux distributions. That is, distros that don’t include any non-free software in the mainline distribution image or package repositories. With that in mind, the said list is quite selective. The names of the distributions are as follows:

- gNewSense
- Ututo
- Blag
- Dynebolic
- GNUStep
- Musix

Something that I found peculiar was that the distributions Debian and Gentoo both have a social contract that ensures the freedom of the distribution. Debian explicitly states on numerous occasions that the system will never require the use of a component that is non-free.

Now, for the interesting part. By performing a simple Netcraft check, we can see the FSF servers running what GNU/Linux distro? Debian, of course! If the concept hasn’t violated your cortex just yet, I must remind you of this double standard of distribution selection. While Debian remains a free distro in its default substance, the official package repositories include a section with a raft of non-free software in it.