There are:
https://www.raspberrypi.com/news/risc-os-for-raspberry-pi/
https://wiki.sugarlabs.org/go/Installation
https://9p.io/wiki/plan9/Raspberry_Pi/index.html
as well as a couple of RTOS options: https://all3dp.com/2/rtos-raspberry-pi-real-time-os/ and QNX: https://pidora.ca/qnx-on-raspberry-pi-the-professional-grade...
and TRON: https://www.tron.org/blog/2023/09/post-1767/ (but that's only on the Pico? I'd love to see it as a desktop OS on an rPi5)
Maintained daily. pi is 32bit and pi3 is 64bit. WiFi works.
There are:
https://www.raspberrypi.com/news/risc-os-for-raspberry-pi/
https://wiki.sugarlabs.org/go/Installation
https://9p.io/wiki/plan9/Raspberry_Pi/index.html
as well as a couple of RTOS options: https://all3dp.com/2/rtos-raspberry-pi-real-time-os/ and QNX: https://pidora.ca/qnx-on-raspberry-pi-the-professional-grade...
and TRON: https://www.tron.org/blog/2023/09/post-1767/ (but that's only on the Pico? I'd love to see it as a desktop OS on an rPi5)