Lubuntu
Lubuntu is a variant of Ubuntu that uses the LXQt desktop environment. (Versions prior to 18.10 shipped with the LXDE desktop.) It includes essential applications and services for daily use, including office suite, PDF reader, image editor and multimedia players.
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GNOME OS
GNOME OS is an experimental, immutable Linux distribution that ships the latest in-development GNOME desktop, core applications and stack. It serves as a reference for developers and testers.