KornShell!

win-bash is a Windows port of the famous GNU bash (see GNU Bash homepage).

This is a reimplementation for Unix, by Byron Rakitzis, of the Plan 9 shell. rc offers much the same capabilities as a traditional Bourne shell, but with a much cleaner syntax.

Xiki makes the command line friendlier and more powerful. Xiki Shell (xsh) lets you use Xiki from command line, in a way that augments your current favorite shell (bash or zsh).

fshell is the Symbian equivalent of bash + telnet + a posix-like set of command-line tools. In other words it's a console framework for Symbian OS with support for remote connections and a suite of tools for debugging the device.

eltclsh (editline tcl shell) is an interactive shell for the TCL programming language. It provides command line editing, history browsing as well as variables and command completion thanks to editline features. The completion engine is programmable in a way similar to tcsh, and comes with an intelligent completion for the full tcl language by default.

a stand-alone shell with many built-in commands. The built in commands of sash have all libraries linked statically, so unlike most shells, the standard UNIX commands do not rely on external libraries. In case of emergencies, you can boot directly into sash and use it as a recovery environment.

Elvish is a friendly and expressive shell for UN*X systems including Linux, macOS and BSDs.

Ergonomica is a cross-platform shell language, implemented in Python. Ergonomica aims to modernize the terminal, in an easily-extensible and usable language, independent of the OS on which it runs. It uses existing core utilities such as the os and shutil packages, as well as other utilities written in Python, such as the suplemon editor, providing built-in tools that are not os-dependent. Existing Python language features such as asynchronous returning may replace components of the shell such as piping. »