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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Gentoo Linux
Gentoo Linux is a versatile and fast, completely free Linux distribution geared towards developers and network professionals. Unlike other distros, Gentoo Linux has an advanced package management system called Portage.