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
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Adobe Animate - Adobe Animate is a Flash, vector animation software.
Unity - The multiplatform game creation tools for everyone.