alt Hacker NewsFor vim users, there's vim-slime:
https://github.com/jpalardy/vim-slime
I don't know if it's as powerful as the real thing, but it allows you to "send" your current vim line or paragraph to a tmux instance running a lisp interpreter, essentially. Very useful.
Vim slime is awesome. I use it for tinkering in languages with a repl like ocaml or javascript.
The feedback loop is probably the best in class from anything i have ever used. No IDE comes even close.