Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Synfig Studio - Just another WordPress site
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
Pencil2D - Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old...