Effeckseer is an open source MIT licensed package enabling you to create game special effects and particle systems. They also include plugins for Unreal Engine, Unity and Cocos2d-x, as well as generic game engine importers.
Links Mentioned:
http://effekseer.github.io/en/index.html
https://github.com/effekseer/Effekseer
https://www.gamedev.net/forums/topic/...