Is there any open source implementation of APL? [closed]

Question

I am aware of J & K; but neither are open source.

I'm also aware of A+, but that seems outdated.

Is there any decent open source implementation of APL?

If so, where? If not, why?

Answer 1

I'm experimenting with an APL interpreter in JavaScript (http://github.com/ngn/apl), runs on node.js or in a browser. It can do basic stuff, like compute a generation of Conway's game of life, but it's early to tell if it can turn out into a decent implementation.