[murukesh_s]

brain.js if I remember correctly is a very old project and is no longer maintained. But it was great to learn the basic ANN concepts. What I would love to see is a Node.js implementation of deep learning and ML libs (those listed above are targeted for browsers). With Node.js supporting most of es6+ features it's been a fun coding in it. Can't wait to get hands on ML with server side JavaScript as well..

[robertplummer]

It is maintained now: http://brain.js.org/

...I'm the maintainer

[Houshalter]

It seems to have been updated quite a bit. With support for more modern NN architectures. But I don't know how fast it is relative to the others.