Event. Zoneflash. Yazo.net - Accueil. The Flash Animation Tool & Component for Flash CS3. gTween: A New Tweening Engine for AS3 Developers. Posted on August 18, 2008 by Grant Skinner There are a lot of great tweening engines out there. Personally, I’m a huge fan of Jack Doyle’s TweenLite (and he’s been incredibly productive adding new features lately). However, none of these libraries exactly fit the needs of me and my team. I wanted an engine that was small, fast, hugely flexible, and built from the ground up for AS3 and developers. The result was gTween. gTween is a small (4.5kb), fast (1500 instances, 0.5s duration, ~25fps), instance based tweening class, with a huge number of options and capabilities. ByteArray.org > Actionscript 3 Experiments.