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Unity - The multiplatform game creation tools for everyone.
LEGO MINDSTORMS EV3 - In the event that you are a LEGO aficionado and one of your distractions incorporate robots, you most likely found out about LEGO robots.
Godot Engine - Feature-packed 2D and 3D open source game engine.
LDraw - LDraw is an open standard for LEGO CAD programs that allow the user to create virtual LEGO models...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Scratch - Scratch is the programming language & online community where young people create stories, games, & animations.