MotionArtist - Comic creator + animation + sound
Unity - The multiplatform game creation tools for everyone.
ToonDoo - ToonDoo is a fun and easy way to create comic strips without having to draw.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Storyboard That - Storyboard That is the world's best online storyboard creator.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.