The klish is a framework for implementing Cisco-like command-line interfaces on Unix systems. It is configurable through XML files. "Klish" stands for "Kommand Line Interface SHell". The klish is a fork of clish-0.7.3. The original clish was developed by Graeme McKerrell. The klish adds some new features, but is compatible (as much as possible) with clish's XML configuration files.
MSYS (Minimal SYStem) provides POSIX/Bourne configure scripts the ability to execute and create a Makefile used by make on Windows systems. This includes a pseudo-terminal, bash, make, sed, awk, etc. Together with a MinGW installation this environment is comparable to a Cygwin installation, except that it is really open source.
The FReakSHell aims to be a sh-compatible shell and command language interpreter that has some advanced features that can not be found in other shells. It aims towards POSIX compliance by trying to implement the IEEE POSIX Shell and Tools specification (IEEE Working Group 1003.2). Advanced features include advanced job control (i.e. job exchange between different processes, dynamic repiping) and built-in auto-completion.