Dive into all the details that a JavaScript developer needs to know to be a great TypeScript developer — Basarat Ali Syed  

JavaScript and TypeScript support enhancements include a reworked Rename refactoring (which can now rename files corresponding to TypeScript types), granular formatter settings, and full support for TypeScript 1.8. 

OS.js is a JavaScript web desktop implementation for your browser with a fully-fledged window manager, Application APIs, GUI toolkits and filesystem abstraction. 

Graph theory (a.k.a. network) library for analysis and visualisation (compatible with CommonJS/Node.js/io.js, AMD/Require.js, npm, Bower, spm, jspm, Meteor/Atmosphere, jQuery, and plain JS/JavaScript)  Demo

An in-depth look to the TypeScript implementation of decorators and how they make possible new exciting JavaScript features like reflection or dependency injection.

Simple, lightweight, persistent, framework-agnostic two-way databinding JavaScript library. With no to little JS code to write. And no dependencies.  Demo

Detecting the end of CSS animation and transition could be useful if you want to back up some of your JavaScript behavior on CSS.  Demo

Extends Twitter Bootstrap with additional lightweight JavaScript controls. Easy to install, customize, update, and optimize. All functionality covered by live documentation and unit tests.  Demo

The Star Rating Plugin is a plugin for the jQuery JavaScript library that creates a non-obstrusive star rating control based on a set of radio input boxes.

Extract prominent colors from an image. Vibrant.js is a javascript port of the awesome Palette class in the Android support library.  Demo