I have started a new series of OpenGLES 2.0 tutorials for iOS that is available for download on the following link:
The tutorials cover the following subjects: - Asset import using Assimp. - Gpu Skinning. - Bump Mapping. - Quaternion camera movement. - Fog. - SkyBox. -Water Reflections.
The code source is distributed under the GPL license. I have added a roadmap for future tutorials, stay tuned.