Ethereal

From-scratch hobby operating system with a custom kernel, window manager, and userspace.

PlatformWebfree

Ethereal is an open-source, from-scratch hobby operating system with its own kernel, window manager, and userspace, unrelated to Linux. It supports SMP, basic USB/disk/network drivers, and ACPI power management, and is typically booted from a LiveCD. Aimed at OS-development hobbyists curious about kernel and desktop-environment internals rather than everyday desktop use.

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