Unity Linux is described as 'The community-oriented Unity Linux is a minimalist distribution and live CD based on Mandriva Linux' and is an app in the OS & Utilities category. There are more than 100 alternatives to Unity Linux for a variety of platforms, including Linux, Self-Hosted solutions, BSD, Windows and Mac. The best alternative is Ubuntu, which is both free and Open Source. Other great apps like Unity Linux are Linux Mint (Free, Open Source), Debian (Free, Open Source), Manjaro Linux (Free, Open Source) and Arch Linux (Free, Open Source).
antiX is a fast, lightweight and easy-to-install linux live CD distribution based on MEPIS and Debian's testing branch for Intel/AMD x86-compatible systems. antiX offers users the "Magic of MEPIS" in an environment suitable for old computers.
illumos is a free and open-source Unix operating system. It derives from OpenSolaris, which in turn derives from SVR4 UNIX and Berkeley Software Distribution (BSD). illumos comprises a kernel, device drivers, system libraries, and utility software for system administration.