The software spine in combination with pixi.js makes it possible to create complex animations in node-webkit.
Spine is a powerful 2D skeleton animation program for games by esoteric software, more about it and demonstration videos are located on their website Esotericsoftware.com
yokumo has developed a better support for spine files in pixi.js Github.com
You can download pixi.js with his extension already from here Raw.github.com
More details about how to create spine animations and combine them with tween.js animations
- Github.com (Article about dynamic/static animations)
- Youtube.com (Spine demonstration video)
A browser demonstration of a spine animation in pixi.js is loacted here Goodboydigital.com