Zsh: Zsh is a Unix command interpreter (shell) from the sh (Bourne
shell) family which of the standard shells most resembles the Korn shell (ksh).
It includes enhancements of many types, notably in the command-line editor,
options for customising its behaviour, filename globbing, features to make
C-shell (csh) users feel more at home and extra features drawn from tcsh. Last modification on July 3 2000.
Gsh: Shell with an integrated terminal window. Last modification on September 5 1999.
esh: New Unix shell, written in Lisp. Last modification on May 16 1999.