Android app developer Chainfire released an interesting app into the Market recently called Chainfire3D - "an intermediary OpenGL driver." Basically, this app sits between your app and the proprietary graphics driver on your device and can manipulate the commands between the two.
This enables you do some pretty rad things with your device in order to increase efficacy, battery life, performance, etc. For example, you can use Chainfire3D to enable night-mode, which basically only powers the red pixels on your device in order to save battery life (yes, it makes everything look red - see below).
Other features of Chainfire3D includes a multitude of texture manipulations, including the ability to reduce texture sizes and quality (for faster gaming) and unroll textures, which converts non-32 bit textures into 32 bit.