I did not find this list particularly useful. It is a nice attempt, but the way it categorizes libraries can be deceptive. I do not think anyone would consider bower and npm to be comparable projects, except in the most abstract sense. The same applies with node and express; one may as well conflate ruby with rails.

That said, a lot of the tools are really good. I would, personally, argue that underscore is the most important javascript library in existence. It transcends frontend and backend, server and client. It is data manipulation at its finest. It brings functional programming paradigms to javascript. It is beautiful.

After spewing this mantra, one of my colleagues wrote a blog post about it that presents a nice introduction[1]. I would also highly recommend Michael Fogus's book, Functional Javascript[2], that heavily relies on it.

1. http://singlebrook.com/blog/simplify-your-javascript-with-un... 2. http://shop.oreilly.com/product/0636920028857.do