Zero Install is a decentralised cross-distribution software installation system. Other features include full support for shared libraries (with a SAT solver for dependency resolution), sharing between users, and integration with native platform package managers. It supports both binary and source packages, and works on Linux, OS X, Unix and Windows systems. It is fully Open Source.

A port of BSD2.11 to a MIPS-based microcontroller with 128 kiB RAM.

The mythical `50 bugs' tape [containing fixes to v6 Unix], described in Peter Salus' book `A Quarter Century of UNIX' has been found lurking in the Unix Archive.

I had saved the URL http://minnie.tuhs.org/pipermail/tuhs/2002-December/000312.html earlier (Tue Sep 9 10:22:41 2014), but 2016-10-19 001877.html appears to be the correct URL. On 2021-04-23, 001877.html does not work, but
https://minnie.tuhs.org/pipermail/tuhs/2002-December/003482.html does
On 2025-02-15, http://www.tuhs.org/pipermail/tuhs/2002-December/003483.html points to an answer about the 50 bugs tape

Lynne Jolitz is one of the authors of 386BSD.

Nice diagrams showing the histories of programming languanges and Unix-like operating systems.

This is a distribution package of ancient UNIX 7th Edition together with a PDP-11 simulator and instructions how to get things running.

Mailing list of The Unix Heritage Society (TUHS). Used to be  http://minnie.tuhs.org/pipermail/tuhs

Ancient Unix File Systems on Mac OS X, Linux and FreeBSD.
A user space file system capable of reading filesystems used by the 5th and 6th edition of Unix.

Rudix is a collection of pre-built Unix software delivered as packages for Mac OS X.
Ready to use, don't need to compile anything. Made for OSX Mountain Lion, Lion and Snow Leopard. Included dependencies when applicable. A wide selection of packages. Developer friendly.

Another unix shell emulation based on JavaScript, which includes command line completion, weather and location information and even an ssh client.