TUXEDO OS
TUXEDO OS is an Ubuntu-based distribution developed in Germany by TUXEDO Computers GmbH, designed and optimised for the company's own range of Linux-friendly personal computers and notebooks. The distribution uses KDE Plasma as the preferred desktop.
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CuerdOS
CuerdOS is a Debian-based GNU/Linux distribution with focus on stability, efficiency and performance. It comes with a series of optimisations, such as performance and memory consumption improvements.