zsh - The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a powerful command interpreter for shell scripting.
GNU Bourne Again SHell - Bash is the shell, or command language interpreter, that will appear in the GNU operating system.
fish shell - The friendly interactive shell.
Xiki - Xiki makes the command line friendlier and more powerful.
the xonsh shell - Xonsh is a Python-powered, cross-platform, Unix-gazing shell language and command prompt.
Rush - rush is a replacement for the unix shell (bash, zsh, etc) which uses pure Ruby syntax.