What are some alternatives?
When comparing GNU Bourne Again SHell and fish, you can also consider the following products
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.
DASH - DASH is a secure, blockchain-based global financial network which offers private transactions.
Xiki - Xiki makes the command line friendlier and more powerful.
Bash - A simple and fast way to hangout with friends
win-bash - win-bash is a Windows port of the famous GNU bash (see GNU Bash homepage).
Oh My Zsh - A delightful community-driven framework for managing your zsh configuration.