Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
One of the most admirable elements about Linux is, once the community has become comfortable with a distro, another one appears to disrupt the status quo. Mint arose out of a desire to create an improved version of Ubuntu; Salix was developed to make Slackware more user-friendly. While these distributions are often argued to be mere spin-offs, and not true distros, they deserve mention for their unique adaptation to an already established distro.
MoonOS is one of these noteworthy distros. It may be an obscure distribution, and it might not be genuinely original, but Moon is too interesting to be ignored. Based upon Ubuntu/Debian, MoonOS takes the comfortability, ease of use, and user-friendly aspect of Linux's number one distro, and gives it a more distinctive feel, reminiscent of the Mac's OS X.