Mabox Linux
Mabox Linux is a Manjaro-based rolling-release distribution. It features the Openbox window manager as its default user interface and provides a welcome screen with access to utilities which add additional software to the operating system.
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SmartOS
SmartOS is an open-source UNIX-like operating system based on illumos, a community fork of OpenSolaris. It features four technologies - ZFS (a combined file system and logical volume manager), DTrace (a dynamic tracing framework for troubleshooting kernel and application problems), Zones (a lightweight virtualisation solution), KVM and bhyve (two full virtualisation solutions for running a variety of guest operating systems, including Linux, Windows, BSD and Plan9).