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
ZBrush - ZBrush is a digital sculpting and painting software solution.
Adobe Animate - Adobe Animate is a Flash, vector animation software.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.