VideoScribe - Make your own whiteboard video animations with Sparkol VideoScribe – award-winning video scribing app for PC, Mac and iPad. Free trial available.
Unity - The multiplatform game creation tools for everyone.
Doodly - Create your own doodle video in just 60 seconds
Godot Engine - Feature-packed 2D and 3D open source game engine.
TTS Sketch Maker - Create amazing whiteboard sketch videos with text-to-speech human-sounding voices in minutes!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.