Atmel code for the OpenARDF hardware project has been written in and for Atmel Studio 7. This video shows just how simple it is to port Arduino sketches to Studio 7: https://www.youtube.com/watch?v=7WnOe00dVu0
The advantage of using Studio 7, along with the Atmel ICE, is that it allows for a much more sophisticated development and debugging approach, using the full capabilities of C or C++ to control the processor, and in-circuit debugging.