XMLStarlet is a set of command line utilities (tools) to transform, query, validate, and edit XML documents and files using simple set of shell commands in similar way it is done for text files with UNIX grep, sed, awk, diff, patch, join, etc utilities.
RMF-DOS is a project to create a compact, 8086-compatible, free clone of MS-DOS.
It's a new GNU/Linux distribution, based on Linux From Scratch, with focus on easy complete and non-redundand system administration made with a simple textual command-line interface and in the interoperability with Windows (Further with other OS).
NPK MUD-like environment: a shell environment that aims to transform a computer shell in a MUD-like text-based virtual reality.
Reenix is a combination of the best of both worlds: DOS and *x. Based on the GNU toolkit and FreeDOS, Reenix is a stepping-stone between the two OSes and a subset of *x which will run on an 8088.
gOSH (General-purpose Object SHell) is a shell whose syntax is based loosely on a combination of the Python and Java languages. It is fully object oriented, capable of multithreading, and transparently ties the scripting tier to executable programs.
A fake login shell for accounts that should not provide real shell functionality but require a login shell for some reason, in particular for SSH port forwarding.