A lot of these can be easily done in Bash, too!

1. `mkcdir () { mkdir -- "$1" && cd -- "$1"; }`

2a. `bind '"\e[A":history-search-backward'; bind '"\e[B":history-search-forward'`

2b. Default behavior for Bash.

3. `shopt -s autocd`

4. `mmv`, `perl-rename`

5. `qalc` from libqalculate: https://github.com/Qalculate/libqalculate

8. Default behavior for Bash.

9. Default behavior for Bash.

Or, you know, any REPL available.