Ubuntu-based

AnduinOS is a custom Ubuntu-based Linux distribution that aims to facilitate developers transitioning from Windows to Linux by maintaining familiar operational habits and workflows. AnduinOS uses apt to manage system-wide packages and uses flatpak to manage graphical applications.

Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.

Windows Ubuntu Operating System

PikaOS is a gaming focused linux distribution focussing on ease of use and high compatability. Using the know how from Nobara combined with a Ubuntu base, PikaOS is almost unrivaled in software compatability.

CAINE Computer Aided INvestigative Environment Live CD/DVD, computer forensics, digital forensics

Vanilla OS is an Immutable Linux-based distribution which aims to provide a vanilla GNOME experience.

Feren OS is an Operating System built on Ubuntu designed for the people who want to take back control of their computer. Download today!

The Best WeaboOS

Robolinux.org

LXLE Linux, Revive your old PC. LXLE is a remastered version of Ubuntu/Lubuntu LTS releases, using the LXDE desktop interface. LXLE provides a complete drop in and go operating system coupled with style, speed and capability. It's light on resources and heavy on functions.

Get apps on AppCenter, the open, pay-what-you-want app store for indie developers.

KDE neon is the latest and greatest of KDE community software packaged on a rock-solid base.

Slax is a modern, portable, small and fast Linux operating system.

Linux Lite is a free easy to use linux based operating system that is suitable for people who are new to linux.

Bodhi, a lightweight Linux distro featuring: Fast, fully customisable Moksha Desktop; 64-bit & 32-bit Non-PAE support; Built on top of Ubuntu

Community-driven, featuring Linux Mint’s Cinnamon Desktop with Ubuntu at the core, packed fast and full of features, here is the most traditionally modern desktop you will ever love.

Unity7 was originally developed by Canonical, but discontinued by them. However, it's back from the dead and being actively developed.