Good starting point from Toronto.
New Operating System with many new perspectives from the original developers of Unix. Now open source and much more developed than before.
Bell Labs hosts this Wiki for users to promote better flow of information. A Wiki is a groupware site, a portion of webspace which anyone may edit. Surprising amount of useful, often casually structured, information.
The official press release.
A few Netkey implementations, Syslog daemon.
Lead distributor for Plan 9 and Inferno OSs.
Bell releases Plan 9 as open source.
Client and server implementations of the 9P and 9P2000 distributed file system protocols for Unix-based operating systems. Includes kernel modules for Linux 2.4.x and 2.6.x kernels.