"Code Hero is a game that teaches you how to make games with a code gun that copies, edits and shoots Javascript in Unity3D."

Learning a bit of javascript on The badges are superfluous, but the interactive learning part is nicely done! /via @waxy

CoffeeScript is a little language that compiles into JavaScript. Underneath all of those embarrassing braces and semicolons, JavaScript has always had a gorgeous object model at its heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way.

The golden rule of CoffeeScript is: "It's just JavaScript". The code compiles one-to-one into the equivalent JS, and there is no interpretation at runtime. You can use any existing JavaScript library seamlessly (and vice-versa). The compiled output is readable and pretty-printed, passes through JavaScript Lint without warnings, will work in every JavaScript implementation, and tends to run as fast or faster than the equivalent handwritten JavaScript.

RT @newsycombinator: Arbor.js - HTML5 graph visualization library