Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Manhattan OS was a great Ubuntu remaster you might remember reading about on WebUpd8. I say "was" because it doesn't exist anymore - you can't download it and there won't be any new versions, not under the "Manhattan OS" name.
That's because Kevin wanted to go with Debian instead of Ubuntu and as a result, he is currently working on a new Linux distribution called Jupiter OS.
You might think that's just another Debian based distro / remaster. Well, it's not: