9front is a community maintained fork of the Plan 9 operating system, which was created at Bell Labs in the 90s. Some of the original creators of UNIX worked on Plan 9, but they don't work on it anymore, and Bell Labs doesn't work on it anymore. Cool people are keeping the old Plan 9 vision alive today, on 9front.
I run 9front daily. See these pages for more information on how that works: