Best free 2D engine for android games? [closed]

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I have been reading up on some free engines to use for a game I would like to develop. However I can't seem to make out which one is best. I have focused on AndEngine and TyphonRT however sadly the latter seems to be not realesed yet, a shame as it apears to be a beetter choise. What would you reccomend?

Thanks

Ps does anyone have links to typhonrt tutorials? Or will they only be realesed as soon as the engine is?