IMO there's a completely sufficient number of third party export options available:
PhoneGap - free, supports Android 2.1+, cloud compilation, but no hardware acceleration
CocoonJS - free (with premium features), supports Android 2.2+ (or 2,3+?), cloud compilation, links sent by e-mail, hardware acceleration
Intel XDK - free, supports Android ?, hardware acceleration, but has some object limitations
Intel Crosswalk - free, supports Android 4.0+, hardware acceleration, possibly the best performance of the bunch