An animation tool for Mac, Windows and Linux for creating 2D animations for games. Spine lets you create animations using the skeletal or cutout technique where images are attached to animatable bones, giving you much more flexibility and efficiency. Your animations are loaded and rendered in your games using one of several Spine Runtimes. Official runtimes are available for several platforms including Unity and cocos2d, as well as generic runtimes for Objective-C. There are even third party runtimes for SpriteKit.