I have decided to open source my 2D/3D engine for Android and it is currently available at GitHub under the MIT License [put random reason here].
The goals behind ShadingZen is to offer a simple framework on which you can build mobile games easily, but without leaving behind performance reasons like stressing out multicore mobile CPUs found in modern phones/tablets. I have borrowed some ideas found at Cocos2D that I just find really useful, like Actions and Transitions.
Go clone it!
I’m using my spare time to create some HOWTOs and examples. I would also like to write down some core concepts of the engine. For more info keep an eye to future changes at the GitHub wiki here.