Hi, I think that you can add LIPS as redirect to the list of implementations. I think that I will keep https://lips.js.org for now. I've also asked Yutaka HARA the author of BiwaScheme (on twitter) if he's ok for adding his implementation to the list. I've added him to the conversation. His implementation is R6RS R7RS and it's bytecode interpreter, but in JavaScript. Mine is R5RS R7RS tree walking interpreter also in JavaScript. I think that the other JavaScript implementations are just toys that are very small and only handful of functions are implemented. Jakub -- Jakub T. Jankiewicz, Web Developer https://jcubic.pl/me