Quasi is Yet Another Python Shell, but with a twist. It supports pluggable "contexts" for non-Python commands, such as OS commands, MySQLdb queries and external programs. At last you can write:
for x in `os ls *.py`:
`os cp $x my_backups`
yume is a menu system with user-variable shell commands. For example, yume -bu date ls -ex -do 'ls -al' 'cal -3' makes a menu with 3 fixed buttons and 2 editable ones that can execute when the mouse cursor crosses them. yume3 is Gtk-based.
Picnix is a set of Unix-like commands for Windows. It has: cat, chmod, cp, df, diff, du, fgrep, grep, head, ls, more, mv, psort, rm, sleep, strings, tail, tee, touch, uniq, wc, which, and pmake, which is largely compatible with Gnu make, and faster.