Roblox - Reimagining the way people come together.
Kodu Game Lab - Kodu lets kids create games on the PC and XBox via a simple visual programming language.
Project Anarchy - Project Anarchy is a complete end to end game engine and state-of-the-art toolset for mobile.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Limon Engine - Limon is a multi platform 3D game engine mainly focusing on first person games.
Godot Engine - Feature-packed 2D and 3D open source game engine.