The funky second OS from the Unix masterminds, Plan 9, has been fully transferred to the Plan 9 Foundation, and it’s been released under the MIT license.
We are thrilled to announce that Nokia has transferred the copyright of Plan 9 to the Plan 9 Foundation. This transfer applies to all of the Plan 9 from Bell Labs code, from the earliest days through their final release.
The most exciting immediate effect of this is that the Plan 9 Foundation is making the historical 1st through 4th editions of Plan 9 available under the terms of the MIT license. These are the releases as they existed at the time, with minimal changes to reflect the above.