I'm working on my scheme/lisp interpreter in JavaScript, it's getting closer to real Scheme. Right now I'm reading R5RS spec and adding new functions. It have pretty nice interop with JavaScript and work in browser and Node.js.

https://jcubic.github.io/lips/

There is lot of features in devel branch I need to release soon version 0.21.0, but first I need to write unit tests.