Godot Engine - Feature-packed 2D and 3D open source game engine.
Unity - The multiplatform game creation tools for everyone.
Flutter.dev - Build beautiful native apps in record time 🚀
MonoGame - MonoGame is an open source implementation of the Microsoft XNA 4 Framework.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
ct.js - ct.js is a 2D game editor (desktop app) based on web technologies.