How about https://www.redox-os.org/ https://www.redox-os.org/ https://www.haiku-os.org/ https://www.haiku-os.org/ ? Harvey OS is retired: https://harvey-os.o

How about https://www.redox-os.org/ https://www.redox-os.org/ https://www.haiku-os.org/ https://www.haiku-os.org/ ? Harvey OS is retired: https://harvey-os.org/ https://harvey-os.org/