Omarchy
Omarchy is an Arch-based Linux distribution featuring the Hyprland tiling window manager. It ships with what a modern software developer would need to be productive immediately, including Neovim, Spotify, Chromium, Typora, Alacritty, LibreOffice and Zoom.
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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).