AndEngine - Free Android 2D OpenGL Game Engine

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The LGPL doesn't require in-place modifiability, just that a user could build a working binary from a newer version of the LGPL'd library and your binary, along with appropriate dev tools and assuming no interfaces have changed. For statically linked C code, the LGPL suggests providing a linkable object file (.o) that the user can use to relink against newer versions of the library. I think that's already the case with Java apps by default, though, because a user can just dump new versions of the library's .jars in to your app, overwriting the old version. Even if you've slurped everything up into one big .jar, they can still extract the new .class files into the .jar, overwriting the old ones. Then they sign the app with their own key and install it on their phone.

In practice though most LGPL-software authors don't even seem aware of this clause (I wasn't until recently) and aren't inclined to enforce it. A bunch of LGPL game libraries, like Ogre3d, have explicitly added a "you can statically link with no hassles" exception, to formalize that understanding. Might be a good idea here?

I meant to upvote you, and missed the up arrow. Sorry.

... I haven't seen anything like this for iPhone and its great that it is free.

This is roughly equivalent to Cocos2d for iPhone. Cocos2d is also being ported to Android.

The problem with rokon (when i looked at it) is that it runs both the rendering and game logic on one thread, which is not optimal for performance. AndEngine takes this a step further by running it on 2 threads and only locking them into sync during the geometry submission phase of the rendering pipeline. By doing this, you save about 10-12ms per frame to do your game logic while an eglBufferSwap is happening (on my Mytouch3g), which in some cases can cause a big speedup for your game.