LIPS: Scheme based Lisp interpreter in JavaScript | Hacker News
Looks great, however note that it doesn't do tail calls, which are required on conforming implementations. I suspect it does tail calls on Safari as Safari is the ONLY browser to completely implement ES6+ and implement proper tail calls (I'd note that it's not the only ES6+ compliant implementation, but most of the rest are aimed at microcontrollers or embedding).
