The new fish is a POSIX command line shell with delightful, intuitive features like autosuggestions, 256 color syntax highlighting, web based configuration, and lots more. Best of all, these features just work, out of the box. No arcane syntax, no twiddling obscure knobs.
It runs inside your favorite terminal emulator, such as Terminal.app, xterm, or iTerm. You’ll feel right at home with its familiar syntax, and its new features will make you instantly more productive, without getting in your way.