Dart Editor 1.5.8

Dart Editor is an open-source tool for editing, debugging, and running Dart applications.

Dart is a new web programming language with libraries, a virtual machine, and tools. Dart helps developers build structured modern web apps. Dart compiles to JavaScript to run across the entire modern web.

• The Dart language is familiar and easy to learn. It's class based and object oriented, without being dogmatic.
• The Pub package manager makes getting and sharing libraries easy.
• Core libraries provide all the basics, including support for asynchronous programming with Futures.
• Performance is good and getting better. Dart apps are fastest in the Dart VM, but they can be speedy even after compilation to JavaScript.
• Web UI lets you use future web APIs today, with support for proposed standards such as web components, MDV, and shadow DOM.
• All modern browsers (both desktop and mobile) can run Dart web apps, thanks to our Dart-to-JavaScript compiler.

https://code.google.com/p/dart/