Plan 9 is a distributed computing environment built at Bell Labs starting in the late 1980s. The system can be obtained from Bell Labs at http://plan9.bell-labs.com/plan9 and runs on PCs and a variety of other platforms. Plan 9 became a convenient platform for experimenting with new ideas, applications, and services.
Plan 9 from User Space provides many of the ideas, applications, and services from Plan 9 on Unix-like systems. It runs on FreeBSD (x86), Linux (x86 and PowerPC), Mac OS X (PowerPC), OpenBSD (x86), and SunOS (Sparc). This has been in openbsd-wip for a while. With the exception of 9pfuse, it is mostly functional (needs rthreads), but it still needs testing on powerpc. It installs into its own hierarchy in ${PREFIX}/plan9, with the '9' command symlinked to ${PREFIX}/bin. If you want to use the Plan9 tools, you can either just use '9 [cmd]' or set PLAN9 in your environment to point to the root of the plan9port tree and put $PLAN9/bin into your PATH (in that case, be aware of the consequences though ...).
plan9port.tgz
Description: gzip compressed data, from Unix