Phoronix: Blender Can Do Simulations With Bullet Physics
Besides the Blender modelling software and game engine being ported to Android with OpenGL ES rendering support, another interesting GSoC project for this popular open-source project was Bullet Physics Library integration...
As a start this new rigid body work doesn't use OpenCL, but the developer said he would update to Bullet 3.0 when it's ready, and start looking at using OpenCL.