I’ve always wanted to like web based IDE’s. However, there was one thing that always prevented it: they’ve always been terrible. Until now that is. http://cloud9ide.com/ Cloud9 is epic. It’s built on node.js and has support for coffeescript and sass syntax highlighting and real time error checking. I can’t even find an desktop ide to do that right! It gets better though. It’s 100% open source so you can install it on locally.