RangerDS 0.54 (the stable version) is released now, which can be used without the hardware.
We hope it can help you to understand our project better.
For now, it is just a demo. So some functions may not be available now.
Once there is any update, we will post it here immediately.
Besides, we sincerely hope to hear some advice about the function and the interface from any of you, helping us to improve the the application.

Download it here:

Discussion @ gbadev: http://forum.gbadev.org/viewtopic.php?t=15450