ash is a bourne shell clone from Berkeley. It supports all of the standard Bourne shell commands and has the advantage of supporting them while remaining considerably smaller than bash.

bash -- (Version 1.14.7, 1,327K)

Bash is an sh-compatible command language interpreter that executes commands read from the standard input or from a file. Bash also incorporates useful features from the Korn and C shells (ksh and csh).

Bash is ultimately intended to be a conformant implementation of the IEEE Posix Shell and Tools specification (IEEE Working Group 1003.2).

mc -- (Version 4.1.35, 869K)

Midnight Commander is a visual shell much like a file manager, only with way more features. It is text mode, but also includes mouse support if you are running GPM. Its coolest feature is the ability to ftp, view tar and zip files, and poke into RPMs for specific files. :-)

pdksh -- (Version 5.2.12, 391K)

pdksh, a remimplementation of ksh, is a command interpreter that is intended for both interactive and shell script use. Its command language is a superset of the sh(1) shell language.

sash -- (Version 2.1, 280K)

Sash is a very simple, statically linked shell. It includes simplified versions built in commands like ls, dd, and gzip. Sash can be quite usefull for system recovery.

tcsh -- (Version 6.07.09, 487K)

'tcsh' is an enhanced version of csh (the C shell), with additional features such as command history, filename completion, and fancier prompts.

zsh -- (Version 3.0.5, 953K)

zsh is an enhanced version of the bourne shell with these features: - very close to ksh/sh grammar, with csh additions - most features of ksh, bash, and tcsh - 75 builtins, 89 options, 154 key bindings - short for loops, ex: for i (*.c) echo $i - select - shell functions ...and many more