Blender - Blender is the open source, cross platform suite of tools for 3D creation.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
Autodesk Maya - Maya is 3D computer animation software with powerful modeling, rendering, simulation, texturing, and animation tools for artists, modelers, and animators.
Synfig Studio - Just another WordPress site
Adobe Animate - Adobe Animate is a Flash, vector animation software.
Adobe Fireworks - Adobe Fireworks is a bitmap and vector graphics editor.