Factor comes to mind; it's a Forth/Joy like stack language. http://factorcode.org http://factorcode.org Lisp machines supposedly worked in a similar way; the c

Factor comes to mind; it's a Forth/Joy like stack language. http://factorcode.org http://factorcode.org Lisp machines supposedly worked in a similar way; the closest you'll get these days is probably Emacs + some Lisp modes (e.g. Geiser or SLIME). http://geiser.nongnu.org http://geiser.nongnu.org https://common-lisp.net/project/slime https://common-lisp.net/project/slime There's also Lively Kernel for Javascript, but that's mostly just an experiment from what I can tell. https://www.lively-kernel.org https://www.lively-kernel.org DrRacket isn't as fully-integrated as Smalltalk, but is still pretty cool. https://docs.racket-lang.org/drracket https://docs.racket-lang.org/drracket