Plan 9 is also participating in GSOC this year. http://p9f.org/wiki/gsoc-2021-ideas/index.html
Re:Plan 9 from Bell Labs in Cyberspace
by choppaface on Tuesday March 23, 2021 @03:10PM
(#26559033)
Rob Pike filled all the application spots himself.
Re:Plan 9 from Bell Labs in Cyberspace
by AceJohnny2 on Tuesday March 23, 2021 @06:46PM
(#26561315)
with assistance from Russ Cox
I've seen Plan 9 in GSoC multiple times, now.
I personally learned about it from GSoC many years ago.
https link timing out for me http://p9f.org/
Plan 9 Foundation: https://p9f.org/
Wikipedia: https://en.wikipedia.org/wiki/Plan_9_from_Bell_Labs
There's still a pretty active community around Plan 9, too.
9Front, a popular fork of Plan 9: http://9front.org/
Interviews with some Plan 9 community members: https://0intro.dev/
Some videos: [A Tour of Acme](https://www.youtube.com/watch?v=dP1xVpMPn8M), [Peertube channel of sigrid's](https://diode.zone/video-channels/necrocheesecake/videos)