Lem for Common Lisp is still active. Plus Emacs has always been around. And Racket's built in editor... I do miss Light Table though, it was very nice.
I mean, it was easy to set up, easy to use, the side pane showed the result of every expression and it was pretty. I'm guessing it fell by the wayside since Emacs and Neovim both have great Lisp plugins plus are easily scriptable.
