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).
Ultimate Edition
Ultimate Edition, first released in December 2006, was a fork of Ubuntu and Linux Mint though recent versions (starting in 2024) have been based on Arch Linux. The goal of the project is to create a complete, seamlessly integrated, visually stimulating, and easy-to-install operating system.