MocaccinoOS is a minimal Linux meta-distribution for the 21st century!
We are working on a more attractive puppy linux, based in F96CE puppy
An easy to use Arch Linux based OS
BlackBuntu Linux
The Pearl Desktop Enviroment - The OS X Alternative
The Ultimate Open Source OSX Alternative Base System
Debox Linux is a live distro based on Debian distribution and Openbox
a beautiful and beginner-friendly Linux desktop operating system
mintyMac 64 bit OS with Xfce4, Gnome,and E17
Mate Desktop with OS X look and feel, System Sounds, MDM, Compiz etc