Bitsbox - Monthly code projects for kids
Godot Engine - Feature-packed 2D and 3D open source game engine.
Kano - The educational computer and coding kit for all ages
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Robo Wunderkind - Coding and robotics made easy for kids 🤖
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.