Some free computer animation software options are Pencil2D, Synfig Studio and Blender, as of December 2015. Pencil2D lets users create two-dimensional animation using vector and bitmap graphics and is compatible with Windows, Mac OSX and Linux.
Synfig Studio is a two-dimensional animation software for Windows, Mac OSX and Linux. It supports various types of layers including fractal, geometric, distortions and gradients. Its bone system lets users use their vector and bitmap images to create cutout animation. Blender is a three-dimensional animation software for Windows, Mac OSX, Linux and FreeBSD. Its modeling tools let users create, edit and transform their models, while its animation tools allow users to turn their models into animations.