I found a opensource tweening engine for haxe that works magic
there are even exmples on it.
It’s by a crossplatfrom company called Gingee
It’s on GitHub!
Here’s an example of it working http://www.gingeeapps.info/gtween/
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GTween is more compact first of all and closer to AS3 convention that most Haxe developers are more familiar with.
But certainly it is another free option that has a very different structure that is worth a go.
Yeah, I think “first” open-source Haxe tween engine is a long-shot. We’ve had tween libraries long before December 30th this year 
I totally agree, though, that people will prefer one library over another, based on features or the API. Bit of trivia, Actuate actually began as “GTweener”, turning GTween into a managed, static API, similar to Tweener. I believe GTween later adopted a static API, using the GTweener name.
Actuate was originally made to map both GTween, BetweenAS3, Tweener and other libraries into a meta-library that leveraged the strengths of multiple different tween libraries, but the more I turned these libraries into a common API, the more I saw the redundancy. When I tried to make a SimpleActuator class (as opposed to the old GTweenActuator, etc) I realized that I actually beat the performance of GTween (by far) and even TweenLite and TweenMax. That’s when I dropped the other actuators and turned Actuate into an independent library.
I think that with Haxe features (which I did not design for when I first made the library), such as @:generic, abstract and other conveniences, I bet Actuate could be made even better.
Thanks for sharing though, hope I’m not talking too much and someone finds this all interesting 
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