Starling is a pure ActionScript 3 library that mimics the conventional Flash display list architecture. In contrast to conventional display objects, however, all content is rendered directly by the GPU — providing a rendering performance unlike anything before. This is made possible by Flash's "Stage3D" technology. Starling does not cost a dime. Download and use it right away — no strings attached. And because it is Open Source, you're always in control: step through the code and learn from its internals. Everything is well documented and easy to understand. Drop your in-house engine and focus on your games!