KnockoutJS is very interesting framework, it uses MVVM pattern, very similar to our desktop.

http://knockoutjs.com/documentation/observables.html

 

Underscore, it is battery to enhance the basic library for JS.

http://underscorejs.org/

 

Jscex, it is one open source project from Zhaojie, and its feature looks like “Async/Await” in Dotnet 4.5

http://blog.zhaojie.me/2012/06/promise-support-in-jscex.html

 

Mozilla developer center, most good resource center for JS developer

https://developer.mozilla.org/en-US/docs

https://developer.mozilla.org/en/JavaScript

 

jsFiddle, try to write code online

http://jsfiddle.net/

 

dailyJS, daily news about JavaScript

http://dailyjs.com/

 

NodeJS, use JS in server side, it could use with IIS and Windows Azure cloud.

http://blog.nodejs.org/2012/06/25/node-v0-8-0/